WHP Ref. No.: PR5/PR6/PRS1
Last updated: 11 July 1994

			CRUISE REPORT
	Repeat hydrography on Lines PR5, PR6, PRS1

A.	 Cruise narrative
a.	 WOCE designation: 		PR5, PR6, PRS1
b.	 Expedition designation: 	18DD9402/1
c.	 Chief scientist: 		Frank Whitney
d.	 Ship: 				John P. Tully
e.	 Ports of call: 		Patricia Bay, B.C.
f.	 Cruise dates: 			May 10 to 25, 1994

A.2.	 Cruise Summary Information
a.	 Geographic boundaries: Following a WOCE training session in coastal 
waters on May 10 and 11, we sailed along Line PR6 to Ocean Station Papa (PRS1). 
After completing a 3 day program at PRS1, the ship returned along Line PR5, 
sampling 3 stations.
b.	 Stations occupied: Table of Stations by type
Sample type:	No. Stations:	Max. Depth:
CTD casts	24		3000ødbar
Rosette casts	94		304ødbar
Loop samples	345 m

c.	 Floats and drifters deployed:  
Six Argos drifters (3 drogued at 15 m and 3 at 120 m) were deployed within a 
0.5 nm box at station PS1. A drifting sediment trap array (9 traps to 1000 m) 
was deployed at PRS1 for 3 days, also a productivity drifter for 8 h. 
d.	 Moorings deployed or recovered: 
One current meter mooring was recovered at station P20.
One sediment trap was recovered and redeployed at P4.
Three traps (200, 1000 and 3800 m) were recovered and redeployed at PRS1.

A.3.	 List of Principal Investigators
Howard Freeland	Climate change 		IOS
C.S. Wong	Climate chemistry	IOS
Ron Perkin	Physical measurements	IOS
Frank Whitney	Chemical measurements	IOS

A.4.	 Scientific Programme and Methods
Surface seawater (uncontaminated sea water, USW), CTD and rosette casts were 
completed at standard stations along Line PR6. Samples were analyzed onboard 
ship for salinity, oxygen, nutrients, CFCs, chlorophyll a and alkalinity. 
Others were preserved for total CO2, 13C, 18O and DOC at selected sites. JGOFS 
sampling for plankton and productivity studies was completed at 5 stations. We 
had time to complete 3 casts along PR5 as we returned to IOS.

A.5.	 Major Problems and Goals Not Achieved
Power interruptions to our CTD fragmented several casts.