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Cruise report: AR28_1975b
(Updated SEP, 2007)


A.  Highlights

A.1.  Cruise Summary Information

               Section Designation  AR28_1975b
Expedition designation (ExpoCodes)  74CH19750704
                  Chief Scientists  D.J. Ellett
                             Dates  1975-07-04 - 1975-07-10
                              Ship  RSS Challenger
                     Ports of call  Greenock, UK - Oban, UK

                                               57.5000 N
                Station boundaries  -12.2500 W            8.9667 W
                                               56.9917 N

                          Stations  29 CTD stations
      Floats and drifters deployed  0 
    Moorings deployed or recovered  1 current meter mooring deployed
                            Author  D.J. Ellett



SMBA, Dunstaffnage Marine Research Laboratory 

Cruise Report: RRS CHALLENGER Cruise 10A/1975. 

Duration:      1312 h 4 July to 0845 h 10 July 1975. All times BST 

Locality:      Rockall Channel, 56° to 58° N. 


Staff: D.J. Ellett 

       R. Bowers 
       G.G. Coghill 
       D.J. Edelsten 
       A.M. Souter 
       G. Tuttle 
       D.I. Williamson (University of Liverpool, Port Erin) 
       A. Medani (UCW, Aberystwyth) 


AIMS: 

1) To establish a current meter mooring in 57°N, 9°W. 
2) To work hydrographic sections from the continental shelf-edge to Anton 
   Dohrn Seamouth and Rockall, and from Rockall Bank towards Malin Head. 
3) To make plankton net tows for crab larvae for Dr. Williamson. 
4) To obtain bottom samples for the Dept. of Geology, UCW, Aberystwyth. 
5) To obtain 50 litre surface water samples for 137 Cs analysis by the 
   Fisheries Radiobiological Laboratory. 
6) To transmit messages of vertical temperature profiles to Bracknell. 


NARRATIVE: 

CHALLENGER sailed in fine, calm weather from Dunstaffnage at 1312 h 4 July. 
Surface samples were taken from the Sound of Mull en route to the first station 
of the Anton Dohrn Seamount section, which was reached at 2320 h. STD lowerings 
were made at five stations (T to P) before returning at 0845 h 5 July to station 
R to launch the current meter mooring. This was completed by 1012 h and work 
along the line of the section was resumed, plankton hauls being made in the 
vicinity of the 500 m isobath and a Shipek grab sample being obtained at station 
P.

Between 1420 h 5 July and 0120 h 7 July stations 0 to A of the section were 
completed in continuing calm weather. Plankton hauls and grab samples were 
obtained or attempted at many of the stations. 

The Rockall-Malin hydrographic section was begun at 0310 h 7 July and light 
winds with barely disturbed sea conditions allowed 10 stations (Q to H) to be 
worked, covering the western two-thirds of the section. At 0745 h 8 July course 
was set for the buoy station with the aim of checking the mooring and carrying 
out a short shelf-edge STD section. Two plankton hauls were taken and an echo-
sounder watch maintained as the ship crossed the Hebrides Terrace. However, at 
1410 h a distress call was received and the ship proceeded to the assistance of 
the trawler GRANTON HARRIER.

Ten survivors were taken off and later flown from CHALLENGER by naval Sea King 
helicopters to Prestwick. CHALLENGER returned to stand by the derelict vessel, 
which, during the evening, was boarded and got under tow. By 1430 h 9 July 
GRANTON HARRIER had been put into running order by a party from CHALLENGER and 
the tow was cast off, both vessels setting course for Ardrossan which was 
reached at 0845 h 10 July. 


RESULTS: 

Aim 1) The current meter mooring was launched without difficulty on 5 July. The 
       satellite navigation system, although experiencing teething troubles, was 
       able usefully to confirm the accuracy of position fixes by other means. 
         Due to the distress call on 8 July it did not prove possible to check 
       the mooring at the end of the cruise, but as the weather had been
       extremely calm in the interim and as no fishing had been taking place at 
       the time of launching, the check was readily foregone. 
Aim 2) All twenty stations of the Anton Dohrn Seamount section were worked, and 
       ten stations of the Rockall-Malin Head section were completed. The STD 
       results were logged on cassette tapes at each station. The data have yet 
       to be studied in detail, but the mass transport values during this 
       period of settled calm will be of considerable interest. 
Aim 3) Plankton hauls were made with 50 cm nets at 23 stations by Dr Williamson. 
       Initially, oblique hauls were made from the centre warp aft, but 
       subsequently vertical hauls or stratified tows from the hydrographic wire 
       were found to be preferable. Spiny crab larvae, found in earlier years 
       over the deep water and Rockall Bank, were absent, and plans to rear 
       adults at Dunstaffnage were not realised.  Plankton from the hauls  was 
       in general sparse, although over the western deep water extensive slicks 
       and foam upon the unusually calm sea surface appeared to indicate 
       plankton blooms in the upper mixed layer, which was of minimal thickness.  
Aim 4) Grab samples were attempted at fourteen slope and deep water stations 
       and seven samples obtained.  The Shipek/hydrowire system is too light 
       for reliable use in deep water, even when calm conditions produce little 
       stray of the wire from the vertical, as on this cruise.  
Aim 5) Samples for 137 Caesium analysis were obtained on 4-5 July at the ten 
       positions also sampled in March and May.  
Aim 6) Eleven messages giving details of temperature profiles to 500 m depth 
       were sent to Bracknell during the cruise. The surface mixed layer was 
       usually of 10 m or less depth over the shelf and bank regions, and mostly 
       absent over the deep water. Surface temperatures of 13°-14° C were not 
       unusually high by comparison with 1948-65 means.  

D.J. Ellett  
11  July 1975.  


PARAMETERS

BODC CODE  Rank  Units      Title
---------  ----  --------   ---------------------------------------------------
PRESPR01    1    Decibars   Pressure (spatial co-ordinate) exerted by the water 
                            column by profiling pressure sensor and corrected 
                            to read zero at sea level
SSALPR01    1    Parts per  Salinity of the water column by 
                 thousand   conductivity cell
TEMPST01    1    Degrees    Temperature of the water column by CTD or STD
                 Celsius   

Definition of Rank
  Rank 1 is a one-dimensional parameter
  Rank 2 is a two-dimensional parameter
  Rank 0 is a one-dimensional parameter describing the second dimension of a 
         two-dimensional parameter (e.g. bin depths for moored ADCP data)


INSTRUMENTATION 
The instrument used was a Bissett Berman STD system and the data were logged on 
a Hewlett Packard 9820. Instrument lowering and raising speeds between 0.5 m/s 
and 1 m/s. An acoustic pinger was placed above the STD to give an accurate depth 
measurement, this could then be used to check the STD pressure calibration. An 
NIO bottle with reversing thermometers was placed above the pinger, within 2m of 
the STD system. A bottle sample was taken at the bottom of the cast providing 
the temperature and salinity are uniform at that point. If large temperature or 
salinity gradients were present then the bottle sample was triggered at a 
suitable site on the upcast. A surface salinity sample was also taken at the 
start of the dip. 

Calibration 
The STD was not calibrated in the laboratory. The manufacturer's calibration was 
used and water samples taken to check the calibration and apply corrections 
where necessary. 

Temperature 
The manufacturer's calibration was used to convert the raw data to physical 
units using the equation below: 

                   Temperature (°C) = (10(^6) /Pt - 2238.68)/55.84

where Pt is the temperature period in microseconds 

These values were then plotted against the water bottle (i.e. reversing 
thermometer) temperatures and a regression line fitted to the data such that: 

                    Temperature(WB) = m x Temperature(STD) + c

Then the regression coefficients (m and c) were applied to correct the STD 
temperature data - these are given in the table below. 

Salinity 
The manufacturer's calibration was used to convert the raw data to physical 
units using the equation below: 

                   Salinity (ppt) = (10(^6) /Ps - 4995)/290.6 + 30 

where Ps is the salinity period in microseconds

These values were then plotted against the STD salinity and a regression line 
fitted to the data such that: 

          Salinity(WB) = m x Salinity(STD) + c + (m1 x Pressure + c1)/1000

Then the regression coefficients were applied to correct the STD salinity data. 
The data showed a salinity - pressure dependency, this was corrected by plotting 
delta-S (i.e. calibrated salinity - calculated salinity) against pressure to 
determine the slope (m1) and intercept (c1). These were then incorporated into 
the equation as shown above. The regression coefficients are given in the table 
below. 

Pressure 

The depths from the acoustic pinger were noted where the bottle samples were 
taken and then used to check the calibration of the pressure sensor - unless 
calibration values were available from the reversing thermometers. The equation 
below was used to convert the pressure period to physical units. 

                       Pressure = (10(^6) /Pd - 9712)/0.26267 

where Pd is the pressure period in microseconds 

A regression fit was carried out using the calibration values and the slope and 
intercept determined. The pressure values could then be corrected using: 

                       Pressure (CORR) = m x Pressure(STD) + c

The fit of the STD data to the water bottle calibration data is given in the 
table below: 

       Variable          Slope (m)  Intercept (c)  Standard Deviation
       ----------------  ---------  -------------  ------------------
       Temperature (°C)    1.0031      0.0127           0.006 
       Salinity (ppt)      0.8434      5.5336           0.007 
       Pressure (dbar)     0.5069     -4.6489           3.764 
       Delta-S             0.0065    -10.4448           8.056 



DATA PROCESSING 

Obvious wild points were edited out of the calibration file and the calibration 
programs run to obtain values for the slopes and intercepts for temperature, 
pressure and salinity. These were then applied to the uncalibrated data and 
sigma-t was calculated. The data values were then sieved to ensure a minimum 
separation between pressure values of 1 dbar. The data were then visually 
inspected and major spikes flagged. 


REFERENCES 

Sharples, F. (1987).  A new data bank of SMBA STD/CTD observations in the 
    Rockall Trough 1975-84. SMBA Marine Physics Group Report No. 36. 
Graham, J.M., Sharples, F., Meldrum, D.T. and Edwards, A. (1987).  STD 
    observations in the Rockall Trough 1975-77. SMBA Marine Physics Group 
    Report No. 39. 



DML Rockall Trough (Anton Dohrn Seamount) CTD Section Stations

                Dist.                          Approx.
      Station  to next  Latitute   Longitude  depth (m)  Comment
      -------  -------  ---------  ---------  ---------  --------------
         A      10.0'   57 35.0 N   13 38 W      130     near Rockall
         B      10.0'   57 34.0 N   13 20 W      210   
         C       5.0'   57 33.0 N   13 00 W      330   
         D       7.5'   57 32.5 N   12 52 W     1000   
         E      12.5'   57 32.0 N   12 38 W     1658   
         F      12.5'   57 30.5 N   12 15 W     1817   
         G      10.0'   57 29.5 N   11 51 W     1812   
         H       7.5'   57 29.0 N   11 32 W     2020   
         I       7.5'   57 28.0 N   11 19 W      750   
         J       7.5'   57 27.0 N   11 05 W      550     seamount crest
         K       7.5'   57 24.0 N   10 52 W      850   
         L      10.0'   57 22.0 N   10 40 W     2076   
         M      12.0'   57 18.0 N   10 23 W     2340   
         N      12.0'   57 14.0 N   10 03 W     2100   
         O      10.0'   57 09.0 N   09 42 W     1900   
         P       7.5'   57 06.0 N   09 25 W     1050   
         Q       7.5'   57 03.0 N   09 13 W      350   
         R       8.0'   57 00.0 N   09 00 W      135     shelf-edge
         S      10.0'   56 57.0 N   08 47 W      125   
         15G     6.25'  56 53.0 N   08 30 W      125   
         T       5.75'  56 50.2 N   08 20 W      120   
         14G     5.75'  56 48.5 N   08 10 W              surface only
         13G     5.75'  56 47.0 N   08 00 W      110   
         12G     5.75'  56 45.5 N   07 50 W              surface only
         11G            56 44.0 N   07 40 W       55     Barra Head

Distance Barra Head to station A is 203 nautical miles. 

Stations R to 11G are an overlap with the Sound of Mull to Shelf-edge section 
(see list c, BODC document reference number 77367). 


DML Rockall Trough (Sound of Mull to Shelf Break) CTD Section 
Stations 

                Dist.                          Approx.
      Station  to next  Latitute   Longitude  depth (m)  Comment
      -------  -------  ---------  ---------  ---------  --------------
      1G (C1)    5.0'   56 40.0 N   06 08 W      190     Off Ardmore Pt. 
      2G (C2)    3.2'   56 41.0 N   06 17 W       40 
      3G         3.2'   56 42.5 N   06 22 W       -      Surface only 
      4G (C3)    5.0'   56 44.0 N   06 27 W      115     Cairns of Coll 
      5G         5.0'   56 44.0 N   06 36 W       -      Surface only 
      6G (C4)    8.2'   56 44.0 N   06 45 W       35     Hawes Bank 
      7G (C5)    5.5'   56 44.0 N   07 00 W      145 
      8G         5.5'   56 44.0 N   07 10 W       -      Surface only 
      9G (C6)    5.5'   56 44.0 N   07 20 W      160 
      10G        5.5'   56 44.0 N   07 30 W      220 
      11G (C7)   5.8'   56 44.0 N   07 40 W       55     Barra Head 
      12G        5.8'   56 45.5 N   07 50 W       -      Surface only 
      13G (C8)   5.8'   56 47.0 N   08 00 W      110 
      14G        5.8'   56 48.5 N   08 10 W       -      Surface only 
      T          6.2'   56 50.2 N   08 20 W      135 
      15G (C9)  10.0'   56 53.0 N   08 30 W      125 
      S          8.0'   56 57.0 N   08 47 W      125 
      16G (C10 & R)     57 00.0 N   09 00 W      135     Shelf-edge 

This section adjoins the Anton Dohrn Seamount Section (indref 77336), with which 
the stations R, S and T, given above, form an overlap. 


DML ROCKALL TROUGH (ADDITIONAL) CTD SECTION STATIONS
DML CTD Sections Across the Shelf-Edge 

  a) Extra Stations Inserted Between Anton Dohrn Stations 

                Dist.                          Approx.
      Station  to next  Latitute   Longitude  depth (m)
      -------  -------  ---------  ---------  ---------
         N      12.0'   57 14.0 N  10 03.0 W    2100
         O       5.0'   57 09.0 N  09 42.0 W    1900
         P1      5.0'   57 07.5 N  09 33.5 W    1375
         P       3.7'   57 06.0 N  09 25.0 W    1050
         Q1      3.7'   57 04.5 N  09 19.0 W     800
         Q       3.7'   57 03.0 N  09 13.0 W     350
         R1      3.7'   57 01.5 N  09 06.5 W     155
         R       8.0'   57 00.0 N  09 00.0 W     135
         S        -     56 57.0 N  08 47.0 W     125

  b) NE-SW section, crossing at R 

                Dist.                          Approx.
      Station  to next  Latitute   Longitude  depth (m)
      -------  -------  ---------  ---------  ---------
         L10     5.0'   57 05.0 N  08 45.0 W     123 
         L9      5.0'   57 02.5 N  08 52.5 W     125 
         R       2.7'   57 00.0 N  09 00.0 W     135 
         L8      2.7'   56 58.5 N  09 04.0 W     145 
         L7      2.7'   56 57.0 N  09 08.0 W     343 
         L6      2.7'   56 55.5 N  09 12.0 W     960 
         L5      5.5'   56 54.0 N  09 16.0 W    1286 
         L4      5.5'   56 51.0 N  09 24.0 W      
         L3      5.5'   56 48.0 N  09 32.0 W    1720
         L2      5.5'   56 45.0 N  09 40.0 W      
         L1      5.5'   56 42.0 N  09 48.0 W    1820 


BODC QUALITY CONTROL FLAGS
The following single character qualifying flags may be associated with one or 
more individual parameters with a data cycle: 
        Flag   Description
        Blank  Unqualified
        -----  ---------------------------------------------------
          <    Below detection limit
          >    In excess of quoted value
          A    Taxonomic flag for affinis (aff.)
          B    Beginning of CTD Down/Up Cast
          C    Taxonomic flag for confer (cf.)
          D    Thermometric depth
          E    End of CTD Down/Up Cast
          G    Non-taxonomic biological characteristic uncertainty
          H    Extrapolated value
          I    Taxonomic flag for single species (sp.)
          K    Improbable value - unknown quality control source
          L    Improbable value - originator's quality control
          M    Improbable value - BODC quality control
          N    Null value
          O    Improbable value - user quality control
          P    Trace/calm
          Q    Indeterminate
          R    Replacement value
          S    Estimated value
          T    Interpolated value
          U    Uncalibrated
          W    Control value
          X    Excessive difference








CCHDO DATA PROCESSING NOTES


DATE      CONTACT  DATA TYPE  EVENT
--------  -------  ---------  -------------------
09/04/07  Muus     CTD        Reformatted, online
          Notes for ELLETT data (ar28 1975-1992)

1. Original data from 2004.03.02_AR28_CTD_HOLLIDAY
   No quality flags.

2. Justin Fields & Danie Kinkade  converted to Exchange format:

   2006.06.16_AR28_CTD_RFMT_DBK  (ar28_1975a)
   2006.08.04_RFMT_AR28_CTD_DBK  (ar28_1975b)
   2006.08.06_RFMT_AR28_CTD_DBK  (ar28_1975c)
   2006.08.08_RFMT_AR28_CTD_DBK  (ar28_1976a - ar28_1977a)
   2006.08.10_RFMT_AR28_CTD_DBK  (ar28_1977c - ar28_1992a)

   2007.07.12_AR28_CTD_RFMT_JFIELDS (ar28_1975a - ar28_1992a)

   Added quality flags: "2"
   CTDPRS formated F9.1
   CTDTMP    "     F9.4
   THETA     "     F9.4
    
3. dm modified July-August 2007:

 a)  Changed Expocodes to new format (CCSSYYYYMMDD)
     See n)  for list of Expocodes.

 b)  Left originator's THETA in file. Normally not in CTD Exchange files.
     Compared to theta calculated with JOA. Near surface values vary +/- .003 
     and deep values vary +/- .001

 c)  Changed quality flags for ar28_1975c_00008_00001_ct1.csv:

      CTDPRS,    CTDSAL,      CTDTMP,     THETA,   
      1111.0,2,  35.2266,2,   7.4700,2,   7.3549,2
      1113.0,2,  35.2270,2,   7.4700,2,   7.3547,2
      1115.0,2,  35.2285,2,   7.4650,2,   7.3495,2
      1117.0,2,  35.2237,2,   7.4567,2,   7.3411,2
      1119.0,2,  35.2193,2,   7.4483,2,   7.3326,2
      1121.0,2,  35.2150,2,   7.4400,2,   7.3241,2
      1123.0,2,  35.4610,3,   7.4300,2,   7.3135,2 CTDSAL FLAG 3 vs 2
      1125.0,2,  35.3800,3,   7.4267,2,   7.3101,2 CTDSAL FLAG 3 vs 2
      1127.0,2,  35.2990,3,   7.4233,2,   7.3068,2 CTDSAL FLAG 3 vs 2
      1129.0,2,  35.2180,2,   7.4200,2,   7.3034,2
      1131.0,2,  35.2165,2,   7.3950,2,   7.2784,2
      1133.0,2,  33.9363,4,   7.3792,2,   7.2646,2 CTDSAL FLAG 4 vs 2
      1135.0,2,  32.6560,4,   7.3633,2,   7.2509,2 CTDSAL FLAG 4 vs 2
      1137.0,2,  35.2110,3,   7.3200,2,   7.2033,2 CTDSAL FLAG 3 vs 2
      1139.0,2,  35.2180,2,   7.3200,2,   7.2031,2
      1141.0,2,  35.2170,2,   7.2967,2,   7.1797,2
      1143.0,2,  35.2177,2,   7.2833,2,   7.1663,2
      1145.0,2,  35.2185,2,   7.2700,2,   7.1528,2
      1147.0,2,  35.2173,2,   7.2700,2,   7.1526,2
      1149.0,2,  35.2160,2,   7.2700,2,   7.1524,2


 d)  Changed quality flags for ar28_1976a_00007_00001_ct1.csv:

       217.5,2,  35.3047,2,   9.3400,2,   9.3157,2
       222.5,2,  35.3015,2,   9.3300,2,   9.3051,2
       227.5,2,  35.2990,2,   9.3300,2,   9.3046,2
       232.5,2,  33.4022,4,   9.3300,2,   9.3047,2 CTDSAL FLAG 4 vs 2
       237.5,2,  35.2930,2,   9.3300,2,   9.3034,2
       242.5,2,  35.3020,2,   9.3000,2,   9.2729,2
       247.5,2,  35.2995,2,   9.2900,2,   9.2624,2
       252.5,2,  34.8453,4,   9.2700,2,   9.2420,2 CTDSAL FLAG 4 vs 2
       257.5,2,  35.2923,2,   9.2500,2,   9.2213,2
       262.5,2,  35.2923,2,   9.2367,2,   9.2075,2
       267.5,2,  35.2907,2,   9.2267,2,   9.1969,2
       272.5,2,  35.2860,2,   9.2000,2,   9.1697,2
       277.5,2,  35.2910,2,   9.1850,2,   9.1542,2
       282.5,2,  35.2920,2,   9.1800,2,   9.1486,2

       597.5,2,  35.2660,2,   8.6900,2,   8.6247,2
       602.5,2,  35.2690,2,   8.6800,2,   8.6142,2
       607.5,2,  35.2620,2,   8.6700,2,   8.6037,2
       612.5,2,  34.8323,4,   8.6533,2,   8.5869,2 CTDSAL FLAG 4 vs 2
       617.5,2,  35.2630,2,   8.6233,2,   8.5561,2
       622.5,2,  35.2660,2,   8.6200,2,   8.5522,2
       627.5,2,  35.2580,2,   8.6033,2,   8.5350,2
       632.5,2,  35.2640,2,   8.5900,2,   8.5212,2
       637.5,2,  35.2603,2,   8.5775,2,   8.5082,2
       642.5,2,  35.2600,2,   8.5500,2,   8.4803,2

 e)  ar28_1976a_00012_00001_ct1.csv has different T-S pattern from
     adjacent stations. Is on slope and was done on April 2. May be
     spring time effect. Left as is.  
 
 f)  ar28_1978b 2006.08.10_RFMT_AR28_CTD_DBK has file names with 1987b 
     instead of 1978b. Left original files as is and corrected on-line files.

 g)  ar28_1978c and ar28_1978d have same cruise dates in HOLLIDAY 00_README
     files, July 11 -  Sept 17, 1978. First has originator expocode of
     74c11b78 (Stations 167-187, Aug 9-11) and second has 74c11d78
     (Sta 369-380, Sept 11-13).
     Cannot find a cruise report in Documentation directory.
     
     Combined into one cruise with new Expocode 74CH19780711.

 h)  ar28_1981b cruise report(ch6_81.pdf) says this cruise departed April 6 and
     returned to Stornoway April 15 at 0740(called Leg A in cruise report) and
     departed April 16 at 1130(called Leg B). Personnel changes were made.
     This cruise was originally reported with one expocode (74c681) for 
     Stations 2-11 and 37-56. I split them into 2 cruises with expocodes:
     74CH19810406 for Stations 2-11 and
     74CH19810416 for Stations 37-56

 i)  Changed file names for ar28_1981c and ar28_1983b from
       ar18_198..... to ar28_198..... to match all other exchange file names.


 j)  ar28_1983a has cruise dates "11 May - 30 Jun 1983" in HOLLIDAY 00_README.
     Cruise report ch7_83.pdf has Leg A "May 11-23, 1983"
                                  Leg B "May 23-June 2, 1983"
     All ctd data is from Leg B so used 74CH19830523 for EXPOCODE.

 k)  Changed quality flags for ar28_1983b_00066_00001_ct1.csv:

     602.5,2,  35.3925,2,   9.3000,2,   9.2313,2
     607.5,2,  35.3860,2,   9.2900,2,   9.2208,2
     612.5,2,  35.3660,3,   9.2700,2,   9.2003,2 CTDSAL FLAG 3 vs 2
     617.5,2,  50.9697,4,   9.2500,2,   9.1656,2 CTDSAL FLAG 4 vs 2
     622.5,2,  35.3725,3,   9.2350,2,   9.1643,2 CTDSAL FLAG 3 vs 2
     627.5,2,  35.3745,2,   9.2200,2,   9.1488,2
     632.5,2,  35.3730,2,   9.2200,2,   9.1482,2

 l)  ar28_1983b Stations 55 and 56 have exactly the same date, time 
     position and bottom depth. Sta 55 20-115db and Sta 56 45-745db.
     Left as is.

 m)  ar28_1992a Stations have 1 decibar intervals. All previous
     data was 2 decibar data.  Left as is for now.

     ar28_1992a Station 30 has temperature but no salinity for 2-6db.
     Used quality flag 9 for CTDSAL & THETA.

      3.0,2,-999.0000,9,  10.8565,2,-999.0000,9
      4.0,2,-999.0000,9,  10.8515,2,-999.0000,9
      5.0,2,-999.0000,9,  10.8535,2,-999.0000,9
      6.0,2,-999.0000,9,  10.8511,2,-999.0000,9
      7.0,2,  35.2356,2,  10.8517,2,  10.8508,2

     00_README flle in ar28_1992a/original/2004.03.02_AR28_CTD_HOLLIDAY
     has info from a Feb 1991 cruise, not ar28_1992a.

 n)  Following is a comparison of cruise indentifiers:


CCHDO DATA PROCESSING NOTES



ELLETT name comparisons    20070824/dm
 
Vessel         Cruise Dates                       Cruise Names                   EXPOCODE         Cruise       Missing
                                    _____________________________________  ______________________ Report       Info
                                    CCHDO             Cruise    00_README  CCHDO         HOLLIDAY  
                                                      Report

Challenger Leg May 1-6, 1975        ar28_1975a        7A/1975     C775     74CH19750501  74c775   ch7a_75.pdf
     "         Jul 4-10, 1975       ar28_1975b        10A/1975    C1075    74CH19750704  74c1075  ch10a_75.pdf
     "         Nov 7-12, 1975       ar28_1975c        14B/1978    C1475    74CH19751107  74c1475  ch14b_75.pdf
     "         Mar 29-Apr 5, 1976   ar28_1976a        5a/1976     C5a76    74CH19760329  74c5a76  ch5a_76.pdf 
     "         May 19-Jun 1, 1976   ar28_1976b        8/1976      C876     74CH19760519  74c876   ch8_76.pdf

     "         Feb 25-Mar 11, 1977  ar28_1977a        4/1977      C477     74CH19770225  74c477   ch4_77.pdf
     "         Apr 14-19, 1977      ar28_1977b        6B/1977     C677     74CH19770414  74c677   ch6b_77.pdf
     "         Aug 20-Sep 3, 1977   ar28_1977c        13/1977     C1377    74CH19770820  74c1377  ch13_77.pdf
     "         Apr 11-21, 1978      ar28_1978a        6/1978      C678     74CH19780411  74c678   ch6_78.pdf
     "         May 31-Jun 10, 1978  ar28_1978b        9/1978      C978(?)  74CH19780531  74c978   ch9_78.pdf

     "         Jul 11-Sep 17, 1978  ar28_1978c        NONE        11B78    74CH19780711  74c11b78 NONE            YES
     "         Jul 11-Sep 17, 1978  ar28_1978d        NONE        11D78    74CH19780711  74c11d78 NONE            YES
     "         Nov 4-11, 1978       ar28_1978e        14B/1978    C1478    74CH19781104  74c1478  ch14b_78.pdf
     "         May 10-23, 1979      ar28_1979a        7/1979      C779     74CH19790510  74c779   ch7_79.pdf
     "         Sep 11-16, 1979      ar28_1979b        13/1979     C1379    74CH19790911  74c1379  ch13_79.pdf

     "         Oct 28-Nov 11, 1979  ar28_1979c        16/1979     C1679    74CH19791028  74c1679  ch16_79.pdf
     "         Apr 21-May 6,1980    ar28_1980a        7/1980      C780     74CH19800421  74c780   ch7_80.pdf
     "         Jan 26-Feb 4,1981    ar28_1981a        2/1981      C281     74CH19810126  74c281   ch2_81.pdf
     "      A  Apr  6-15, 1981      ar28_1981b_leg_a  6/1981      C681     74CH19810406  74c681   ch6_81.pdf
     "      B  Apr 16-21, 1981      ar28_1981b_leg_b  6/1981      C681     74CH19810416  74c681   ch6_81.pdf

     "         Jul 4-14, 1981       ar28_1981c        NONE        C1081    74CH19810704  74c1081  NONE            YES
     "         Oct 6-20, 1981       ar28_1981d        15/81       C1581    74CH19811006  74c1581  ch15_81.pdf
     "      A  May 11-23, 1983      ar28_1983a        7/1983      C783     no data       74c783   ch7_83.pdf
     "      B  May 23-Jun 2, 1983   ar28_1983a        7/1983      C783     74CH19830523  74c783   ch7_83.pdf
     "         Aug 10-24, 1983      ar28_1983b        NONE        C1183    74CH19830810  74c1183  NONE            YES

     "         Nov 16-Dec 6, 1984   ar28_1984a        NONE        C1084    74CH19841116  74c1084  NONE            YES
     "         Jan 20-Feb 5, 1985   ar28_1985a        1/1985      C185     74CH19850120  74c185   ch1_85.pdf
     "         May 2-16, 1985       ar28_1985b        4/1985      C485     74CH19850502  74c485   ch4_85.pdf
     "         Aug 14-28, 1985      ar28_1985c        8/1985      C885     74CH19850814  74c885   ch8_85.pdf
     "         Jan 8-22, 1987       ar28_1987a        9/87        C987     74CH19870108  74c987   ch9_87.pdf

     "         Apr 24-May 7, 1987   ar28_1987b        14/1987     C1487    74CH19870424  74c1487  ch14_87.pdf
     "         Nov 23-Dec 5, 1987   ar28_1987c        22/1987     C2287    74CH19871123  74c2287  ch22_87.pdf
     "         Jun 6-23, 1988       ar28_1988a        30/1988     C3088    74CH19880606  74c3088  ch30_88.pdf

ELLETT name comparisons    20070824/dm
 
Vessel         Cruise Dates                       Cruise Names                   EXPOCODE          Cruise      Missing
                                    _____________________________________  ______________________  Report      Info
                                    CCHDO             Cruise    00_README  CCHDO         HOLLIDAY  
                                                      Report

Discovery      Jan 20-Feb 4, 1989   ar28_1989a        180         D18089   74E319890120  74d18089  d180.pdf

Lough Foyle    May 5-11, 1989       ar28_1989b        1/1989      LF189    74__19890505  74lf189   lf1_89.pdf     YES 
  "     "      UNK(Sta:Aug5-6,1989) ar28_1989c        NONE        LF289    74__1989____  74lf289   NONE           YES
               NODC says 74LF is "Loch Fada". No NODC shipcode for Lough Foyle  

Charles Darwin Nov 24-Dec 2, 1989   ar28_1989d        44/89       CD4489   74AB19891124  74cd4489  cd44.pdf

Challenger     Jun 21-Jul 5, 1990   ar28_1990a        67/1990     C6790    74CH19900621  74c6790   ch67_90.pdf
     "         Aug 29-Sep 17, 1990  ar28_1990b        71/1990     C7190    74CH19900829  74c7190   ch71_90.pdf
     "         Sep 25-Oct 6, 1992   ar28_1992a        97/92       _____    74CH19920925  74c9792   ch97_92.pdf    YES

