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Metadata Report for BODC Series Reference Number 1864312

Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
Niskin bottle  discrete water samplers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Unknown
Originating Organization British Oceanographic Data Centre Bidston (now British Oceanographic Data Centre, Liverpool)
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) North Sea Project 1987-1992

Data Identifiers

Originator's Identifier CH57_CTD_PIGX_16:2406
BODC Series Reference 1864312

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1989-07-24 18:43
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -

Spatial Co-ordinates

Latitude 52.70102 N ( 52° 42.1' N )
Longitude 2.41179 E ( 2° 24.7' E )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 0.6 m
Maximum Sensor or Sampling Depth 40.9 m
Minimum Sensor or Sampling Height 9.4 m
Maximum Sensor or Sampling Height 49.7 m
Sea Floor Depth 50.3 m
Sea Floor Depth Source PEVENT
Sensor or Sampling Distribution Unspecified -
Sensor or Sampling Depth Datum Unspecified -
Sea Floor Depth Datum Unspecified -


BODC CODERankUnitsTitle
ADEPZZ011MetresDepth (spatial coordinate) relative to water surface in the water body
BOTTFLAG1Not applicableSampling process quality flag (BODC C22)
CPHLPR011Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >unknown phase] by in-situ chlorophyll fluorometer
SAMPRFNM1DimensionlessSample reference number

Definition of BOTTFLAG

0The sampling event occurred without any incident being reported to BODC.
1The filter in an in-situ sampling pump physically ruptured during sample resulting in an unquantifiable loss of sampled material.
2Analytical evidence (e.g. surface water salinity measured on a sample collected at depth) indicates that the water sample has been contaminated by water from depths other than the depths of sampling.
3The feedback indicator on the deck unit reported that the bottle closure command had failed. General Oceanics deck units used on NERC vessels in the 80s and 90s were renowned for reporting misfires when the bottle had been closed. This flag is also suitable for when a trigger command is mistakenly sent to a bottle that has previously been fired.
4During the sampling deployment the bottle was fired in an order other than incrementing rosette position. Indicative of the potential for errors in the assignment of bottle firing depth, especially with General Oceanics rosettes.
5Water was reported to be escaping from the bottle as the rosette was being recovered.
6The bottle seals were observed to be incorrectly seated and the bottle was only part full of water on recovery.
7Either the bottle was found to contain no sample on recovery or there was no bottle fitted to the rosette position fired (but SBE35 record may exist).
8There is reason to doubt the accuracy of the sampling depth associated with the sample.
9The bottle air vent had not been closed prior to deployment giving rise to a risk of sample contamination through leakage.

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)

Problem Reports

No Problem Report Found in the Database

Data Access Policy

Open Data supplied by Natural Environment Research Council (NERC)

You must always use the following attribution statement to acknowledge the source of the information: "Contains data supplied by Natural Environment Research Council."

Narrative Documents

Niskin Bottle

The Niskin bottle is a device used by oceanographers to collect subsurface seawater samples. It is a plastic bottle with caps and rubber seals at each end and is deployed with the caps held open, allowing free-flushing of the bottle as it moves through the water column.

Standard Niskin

The standard version of the bottle includes a plastic-coated metal spring or elastic cord running through the interior of the bottle that joins the two caps, and the caps are held open against the spring by plastic lanyards. When the bottle reaches the desired depth the lanyards are released by a pressure-actuated switch, command signal or messenger weight and the caps are forced shut and sealed, trapping the seawater sample.

Lever Action Niskin

The Lever Action Niskin Bottle differs from the standard version, in that the caps are held open during deployment by externally mounted stainless steel springs rather than an internal spring or cord. Lever Action Niskins are recommended for applications where a completely clear sample chamber is critical or for use in deep cold water.

Clean Sampling

A modified version of the standard Niskin bottle has been developed for clean sampling. This is teflon-coated and uses a latex cord to close the caps rather than a metal spring. The clean version of the Levered Action Niskin bottle is also teflon-coated and uses epoxy covered springs in place of the stainless steel springs. These bottles are specifically designed to minimise metal contamination when sampling trace metals.


Bottles may be deployed singly clamped to a wire or in groups of up to 48 on a rosette. Standard bottles have a capacity between 1.7 and 30 L, while Lever Action bottles have a capacity between 1.7 and 12 L. Reversing thermometers may be attached to a spring-loaded disk that rotates through 180° on bottle closure.

CTD Calibration Sample Data Set as part of the North Sea Project

Document History

Converted from CDROM documentation.

Sampling strategy and methodology

During the North Sea Project a significant data set of samples used to calibrate the CTD sensors accrued. This document describes the methods used to obtain these data.


A salinity sample, usually from the bottle fired nearest to the sea floor, was drawn from each cast after several washings with the sample sea water into a screw topped glass bottle with an airtight plastic seal. Samples were transferred in batches to the ship's constant temperature laboratory where they were left for at least 24 hours to attain thermal equilibrium.

Salinities were measured on a Guildline Autosal salinometer using standard sea water as a reference standard. Occasionally, if supplies of standard sea water ran low, batches of sea water calibrated against standard sea water were used as a secondary standard.

Quality control comprised the rejection of salinity values shown to be erroneous during the CTD calibration exercise.


On each CTD cast one of the sample bottles (usually the first to be fired at the bottom of the cast) was fitted with a frame containing two SIS RTM-4002 digital thermometers which reversed, triggering the thermometers, when the bottle was fired.

The readings were corrected using manufacturers calibration sheets. If the calibrated values differed by more than 0.009C, the data were checked and erroneous values rejected. Checks were also made to eliminate erroneous data resulting from failure to reset the thermometers between casts. The two values (if both deemed good) were averaged. Any further values shown to be erroneous during the CTD calibration exercise were deleted from the data set.

Dissolved Oxygen

Three replicate samples were drawn from the water bottles into 60 ml borosilicate glass stoppered bottles and 0.5ml of each Winkler reagent added using BCD multi-addition pipettes. The reagents were prepared according to the recommendations of Carrit and Carpenter (1966). After mixing, the oxygen bottles were stored under fresh water until analysed.

Analysis was undertaken on board using the manual photometric endpoint detector method described by Bryan et al (1976).

Chlorophyll and Phaeopigment

Extracted chlorophyll and phaeopigments for all cruises where chlorophylls were done with the exception of CH72A and CH72C were determined in the same laboratory, Plymouth Marine Laboratory, using the following protocol.

Up to 2 litres of water for each sample were filtered through glass fibre filters (GFF) and frozen quickly on board ship. The samples were returned frozen to the laboratory where they were extracted with 90% acetone and assayed in a scanning spectrophotometer. The concentrations of chlorophyll and phaeopigments were calculated using the SCOR-UNESCO algorithms (Strickland and Parsons, 1968).

The chlorophyll and phaeopigment determinations on the two legs of Challenger 72 (A and C) in 1990 were undertaken by a different group using a totally different protocol as follows.

Up to 0.5 litres of sea water were filtered through Whatman GFF filters taking care to avoid unnecessary exposure to light. Filters were then extracted, on board ship, in the dark in 90% Analar grade acetone, 10% distilled water, neutralised with sodium bicarbonate.

Fluorescence was measured at sea using a Turner Designs bench fluorometer, calibrated using spectrophotometrically determined standards, before and after acidification with 8% HCl. Chlorophyll and phaeopigment concentrations were calculated using the equation in Tett (1987). The resulting measurement of 'chlorophyll' is the sum of chlorophyll-a and chlorophyllide-a.

Total and Organic Sediment

Two litres of water were drawn from each CTD bottle into a large measuring cylinder. Each sample was filtered using a vacuum filtration system onto a pre-weighed filter. On the early cruises (CH28, CH33, CH35, CH37 and CH39) Nucleopore filters were used. On later cruises these were replaced by GFF filters. Each sample was carefully washed with distilled water to remove salt, removed from the filtration system and air dried.

In some cases where samples had a large sediment load it proved impossible to filter two litres. In these cases, as much of the sample as possible was filtered and the volume filtered determined by noting the volume of water remaining in the measuring cylinder.

After the cruise, each sample was dried and reweighed to constant weight to give the total suspended matter concentration. The samples were then ashed and the organic sediment content obtained from the loss of weight on ignition. The polycarbonate Nucleopore filters used at the beginning of the project decomposed on ignition. Consequently, there are no organic sediment data for project cruises before Challenger 41.


Bryan, J.R., Riley, J.P. and Williams, P.J.LeB. (1976). A Winkler procedure for making precise measurements of oxygen concentration for productivity and related studies. J. Exp. Mar. Biol. Ecol. 21, 191-197.

Carrit, D.E. and Carpenter, J.H. (1966). Comparison and evaluation of currently employed modifications of the Winkler method for determining dissolved oxygen in sea water. J. Mar. Res. 24, 286-318.

Strickland, J.D.H. and Parsons, T.R. (1968). A practical handbook of sea water analysis. Bull.Fish.Res.Bd.Can.:167.

Tett, P.B. (1987). Plankton: in Baker, J.M. and Wolff, W.J. (eds.) Biological surveys of estuaries and coasts. CUP, Cambridge, U.K. 280-341.

Project Information

North Sea Project

The North Sea Project (NSP) was the first Marine Sciences Community Research project of the Natural Environment Research Council (NERC). It evolved from a NERC review of shelf sea research, which identified the need for a concerted multidisciplinary study of circulation, transport and production.

The ultimate aim of the NERC North Sea Project was the development of a suite of prognostic water quality models to aid management of the North Sea. To progress towards water quality models, three intermediate objectives were pursued in parallel:

  • Production of a 3-D transport model for any conservative passive constituent, incorporating improved representations of the necessary physics - hydrodynamics and dispersion;
  • Identifying and quantifying non-conservative processes - sources and sinks determining the cycling and fate of individual constituents;
  • Defining a complete seasonal cycle as a database for all the observational studies needed to formulate, drive and test models.

Proudman Oceanographic Laboratory hosted the project, which involved over 200 scientists and support staff from NERC and other Government funded laboratories, as well as seven universities and polytechnics.

The project ran from 1987 to 1992, with marine field data collection between April 1988 and October 1989. One shakedown (CH28) and fifteen survey cruises (Table 1), each lasting 12 days and following the same track, were repeated monthly. The track selected covered the summer-stratified waters of the north and the homogeneous waters in the Southern Bight in about equal lengths together with their separating frontal band from Flamborough head to Dogger Bank, the Friesian Islands and the German Bight. Mooring stations were maintained at six sites for the duration of the project.

Table 1: Details of NSP Survey Cruises on RRS Challenger
Cruise No. Date
CH28 29/04/88 - 15/05/88
CH33 04/08/88 - 16/08/88
CH35 03/09/88 - 15/09/88
CH37 02/10/88 - 14/10/88
CH39 01/11/88 - 13/11/88
CH41 01/12/88 - 13/12/88
CH43 30/12/88 - 12/01/89
CH45 28/01/89 - 10/02/89
CH47 27/02/89 - 12/03/89
CH49 29/03/89 - 10/04/89
CH51 27/04/89 - 09/05/89
CH53 26/05/89 - 07/06/89
CH55 24/06/89 - 07/07/89
CH57 24/07/89 - 06/08/89
CH59 23/08/89 - 04/09/89
CH61 21/09/89 - 03/10/89

Alternating with the survey cruises were process study cruises (Table 2), which investigated some particular aspect of the science of the North Sea. These included fronts (nearshore, circulation and mixing), sandwaves and sandbanks, plumes (Humber, Wash, Thames and Rhine), resuspension, air-sea exchange, primary productivity and blooms/chemistry.

Table 2: Details of NSP Process cruises on RRS Challenger
Cruise No. Date Process
CH34 18/08/88 - 01/09/88 Fronts - nearshore
CH36 16/09/88 - 30/09/88 Fronts - mixing
CH56 08/07/89 - 22/07/89 Fronts - circulation
CH58 07/08/89 - 21/08/89 Fronts - mixing
CH38 24/10/88 - 31/10/88 Sandwaves
CH40 15/11/88 - 29/11/88 Sandbanks
CH42 15/12/88 - 29/12/88 Plumes/Sandbanks
CH46 12/02/89 - 26/02/89 Plumes/Sandwaves
CH44 13/01/89 - 27/01/89 Resuspension
CH52 11/05/89 - 24/05/89 Resuspension
CH60 06/09/89 - 19/09/89 Resuspension
CH48 13/03/89 - 27/03/89 Air/sea exchanges
CH62 05/10/89 - 19/10/89 Air/sea exchanges
CH50 12/04/89 - 25/04/89 Blooms/chemistry
CH54 09/06/89 - 22/06/89 Production

In addition to the main data collection period, a series of cruises took place between October 1989 and October 1990 that followed up work done on previous cruises (Table 3). Process studies relating to blooms, plumes (Humber, Wash and Rhine), sandwaves and the flux of contaminants through the Dover Strait were carried out as well as two `survey' cruises.

Table 3: Details of NSP `Follow up' cruises on RRS Challenger
Cruise No. Date Process
CH62A 23/10/89 - 03/11/89 Blooms
CH64 03/04/90 - 03/05/90 Blooms
CH65 06/05/90 - 17/05/90 Humber plume
CH66A 20/05/90 - 31/05/90 Survey
CH66B 03/06/90 - 18/06/90 Contaminants through Dover Strait
CH69 26/07/90 - 07/08/90 Resuspension/Plumes
CH72A 20/09/90 - 02/10/90 Survey
CH72B 04/10/90 - 06/10/90 Sandwaves/STABLE
CH72C 06/10/90 - 19/10/90 Rhine plume

The data collected during the observational phase of the North Sea Project comprised one of the most detailed sets of observations ever undertaken in any shallow shelf sea at that time.

Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 1989-07-24
End Date (yyyy-mm-dd) 1989-07-24
Organization Undertaking ActivityUniversity of Wales, Bangor School of Ocean Sciences (now Bangor University School of Ocean Sciences)
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierCH57_CTD_2406
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for CH57_CTD_2406

Sample reference number Nominal collection volume(l) Bottle rosette position Bottle firing sequence number Minimum pressure sampled (dbar) Maximum pressure sampled (dbar) Depth of sampling point (m) Bottle type Sample quality flag Bottle reference Comments
304708   10.00       45.40   45.50   40.90 Niskin bottle No problem reported    
304711   10.00       22.20   22.30   17.90 Niskin bottle No problem reported    
304725   10.00        4.70    4.90     .60 Niskin bottle No problem reported    

Please note:the supplied parameters may not have been sampled from all the bottle firings described in the table above. Cross-match the Sample Reference Number above against the SAMPRFNM value in the data file to identify the relevant metadata.

Related Data Activity activities are detailed in Appendix 1


Cruise Name CH57
Departure Date 1989-07-24
Arrival Date 1989-08-06
Principal Scientist(s)Paul Tett (University of Wales, Bangor School of Ocean Sciences)
Ship RRS Challenger

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

Station NameNSP Survey E and CTD Site AB
CategoryOffshore area
Latitude52° 43.00' N
Longitude2° 25.00' E
Water depth below MSL49.0 m

North Sea Project Survey Mooring Site E and CTD Site AB

Site E was one of six fixed stations where moorings were deployed during the North Sea Project survey. This location is also one of 123 North Sea Project CTD Sites.

The site was situated in a region of strong tidal currents, up to a maximum of 1.5 m/s. This, together with the water depth (49 m), produced well mixed conditions through the water column, throughout the year.

The rigs deployed here line within a box bounded by co-ordinates 52° 40.78'N, 002° 24.67'E at the southwest corner and 52° 42.55'N, 002° 25.71'E at the northeast corner. The magnetic variation at this site was 3.8°W.

The deployment history for site E is summarised below:

Rig ID Meter
C33EC CM(S4) 35.0 04/08/88 41.3 Good data
CM(S4) 20.0 0.0 Data corrupt
7.0 41.3 Good data
C35EC CM(S4) 35.0 15/09/88 0.0 No data recorded
CM(S4) 20.0 17.0 Good data
7.0 17.0
C37EC CM (S4) 35.0 02/10/88 0.0 Mooring lost
CM (S4) 20.0
C41EC CM(S4) 35.0 01/12/88 28.9 Good data
CM(S4) 20.0
C45EC CM(S4) 35.0 28/01/89 41.9 Good data
CM (S4) 20.0
7.0 11/03/89 18.0 Good data
C47EF Fluorometer 40.5 11/03/89 18.0 Instrument height suspect
7.0 29/03/89 40.3 Good data
C49EF Fluorometer 40.5 29/03/89 36.0 Instrument height and calibration suspect
C51EC CM (S4) 35.0 09/05/89 48.8 Good data
CM (S4) 20.0
7.0 0.0 Meter not recovered
C53EC CM (S4) 35.0 06/06 89 18.0 Good data
CM (S4) 20.0
C55EC CM(S4) 35.0 24/06/89 0.0 Instrument damaged, no data.
CM (S4) 20.0 2.9 Short record
7.0 2.9 Short record for Velocity, Salinity and Pressure
30.0 Good data for Temperature
C57EC CM (S4) 35.0 02/08/89 29.9 Good data
CM (S4) 20.0 0.0 Corrupt data
7.0 21.9 Short record for Velocity
29.9 Good Temperature data
C59EC CM (S4) 35.0 23/08/89 28.9 Good data
CM (S4) 20.0 23.9 Meter failed towards the end of the deployment
7.0 7.2 Rotor fouled by fishing line, short record

Related Fixed Station activities are detailed in Appendix 2

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

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
0 no quality control
1 good value
2 probably good value
3 probably bad value
4 bad value
5 changed value
6 value below detection
7 value in excess
8 interpolated value
9 missing value
A value phenomenon uncertain
Q value below limit of quantification

Appendix 1: CH57_CTD_2406

Related series for this Data Activity are presented in the table below. Further information can be found by following the appropriate links.

If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.

Series IdentifierData CategoryStart date/timeStart positionCruise
1245528Water sample data1989-07-24 18:43:0052.70102 N, 2.41179 ERRS Challenger CH57
1708984Water sample data1989-07-24 18:43:0052.70102 N, 2.41179 ERRS Challenger CH57

Appendix 2: NSP Survey E and CTD Site AB

Related series for this Fixed Station are presented in the table below. Further information can be found by following the appropriate links.

If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.

Series IdentifierData CategoryStart date/timeStart positionCruise
248577Currents -subsurface Eulerian1988-08-04 23:00:0052.715 N, 2.4217 ENot applicable
591867Currents -subsurface Eulerian1988-08-04 23:00:0052.715 N, 2.4217 ENot applicable
768953CTD or STD cast1988-08-04 23:29:0052.71633 N, 2.42667 ERRS Challenger CH33
782995CTD or STD cast1988-09-03 20:09:0052.693 N, 2.41017 ERRS Challenger CH35
248553Currents -subsurface Eulerian1988-09-15 07:30:0052.7092 N, 2.4277 ENot applicable
591935Currents -subsurface Eulerian1988-09-15 07:30:0052.7092 N, 2.4277 ENot applicable
784210CTD or STD cast1988-10-02 06:03:0052.6915 N, 2.41667 ERRS Challenger CH37
821234CTD or STD cast1988-11-01 20:23:0052.68833 N, 2.41517 ERRS Challenger CH39
785643CTD or STD cast1988-12-01 21:32:0052.69217 N, 2.41217 ERRS Challenger CH41
248633Currents -subsurface Eulerian1988-12-01 23:50:0052.6872 N, 2.4285 ENot applicable
248713Currents -subsurface Eulerian1988-12-01 23:50:0052.6872 N, 2.4285 ENot applicable
591880Currents -subsurface Eulerian1988-12-01 23:50:0052.6872 N, 2.4285 ENot applicable
785815CTD or STD cast1988-12-30 22:50:0052.68633 N, 2.436 ERRS Challenger CH43
248725Currents -subsurface Eulerian1989-01-28 21:50:0052.6797 N, 2.4233 ENot applicable
248645Currents -subsurface Eulerian1989-01-28 22:00:0052.6797 N, 2.4233 ENot applicable
591892Currents -subsurface Eulerian1989-01-28 22:00:0052.6797 N, 2.4233 ENot applicable
791009CTD or STD cast1989-01-28 22:23:0052.68483 N, 2.44583 ERRS Challenger CH45
1859358Water sample data1989-01-28 22:26:0052.68486 N, 2.44576 ERRS Challenger CH45
792210CTD or STD cast1989-02-27 18:52:0052.69133 N, 2.41167 ERRS Challenger CH47
611495Fluorescence or pigments1989-03-11 15:27:0052.6833 N, 2.4233 ENot applicable
793655CTD or STD cast1989-03-11 19:23:0052.684 N, 2.4205 ERRS Challenger CH47
1858355Water sample data1989-03-11 19:27:0052.68396 N, 2.42054 ERRS Challenger CH47
591923Currents -subsurface Eulerian1989-03-11 20:00:0052.6837 N, 2.4237 ENot applicable
793667CTD or STD cast1989-03-11 20:35:0052.67733 N, 2.41983 ERRS Challenger CH47
793711CTD or STD cast1989-03-29 19:38:0052.68433 N, 2.423 ERRS Challenger CH49
1858380Water sample data1989-03-29 19:42:0052.68437 N, 2.42308 ERRS Challenger CH49
793723CTD or STD cast1989-03-29 19:58:0052.68767 N, 2.42467 ERRS Challenger CH49
1858392Water sample data1989-03-29 20:02:0052.68768 N, 2.42461 ERRS Challenger CH49
793735CTD or STD cast1989-03-29 20:28:0052.68433 N, 2.41717 ERRS Challenger CH49
1858411Water sample data1989-03-29 20:31:0052.68427 N, 2.41718 ERRS Challenger CH49
591855Currents -subsurface Eulerian1989-03-29 20:59:0052.687 N, 2.4153 ENot applicable
793747CTD or STD cast1989-03-29 21:01:0052.68517 N, 2.41467 ERRS Challenger CH49
1858423Water sample data1989-03-29 21:05:0052.68513 N, 2.41471 ERRS Challenger CH49
611483Fluorescence or pigments1989-03-29 21:29:0052.6867 N, 2.415 ENot applicable
795895CTD or STD cast1989-04-27 22:00:0052.68917 N, 2.42183 ERRS Challenger CH51
794683CTD or STD cast1989-04-28 01:08:0052.67817 N, 2.416 ERRS Challenger CH51
795883CTD or STD cast1989-05-09 05:07:0052.69783 N, 2.41067 ERRS Challenger CH51
1861720Water sample data1989-05-09 05:13:0052.69781 N, 2.41062 ERRS Challenger CH51
248589Currents -subsurface Eulerian1989-05-09 05:40:0052.687 N, 2.4153 ENot applicable
248817Currents -subsurface Eulerian1989-05-09 05:40:0052.687 N, 2.4153 ENot applicable
795975CTD or STD cast1989-05-26 20:39:0052.695 N, 2.4115 ERRS Challenger CH53
1863007Water sample data1989-05-26 20:41:0052.69495 N, 2.41151 ERRS Challenger CH53
248842Currents -subsurface Eulerian1989-06-06 18:20:0052.6842 N, 2.4203 ENot applicable
248891Currents -subsurface Eulerian1989-06-06 18:20:0052.6842 N, 2.4203 ENot applicable
797306CTD or STD cast1989-06-24 17:29:0052.70183 N, 2.41717 ERRS Challenger CH55
1656278Water sample data1989-06-24 17:32:0052.7019 N, 2.41714 ERRS Challenger CH55
1865512Water sample data1989-06-24 17:32:0052.7019 N, 2.41714 ERRS Challenger CH55
248774Currents -subsurface Eulerian1989-06-24 19:10:0052.6833 N, 2.41 ENot applicable
591911Currents -subsurface Eulerian1989-06-24 19:10:0052.6833 N, 2.41 ENot applicable
798660CTD or STD cast1989-07-24 18:39:0052.701 N, 2.41183 ERRS Challenger CH57
1245528Water sample data1989-07-24 18:43:0052.70102 N, 2.41179 ERRS Challenger CH57
1708984Water sample data1989-07-24 18:43:0052.70102 N, 2.41179 ERRS Challenger CH57
248485Currents -subsurface Eulerian1989-07-24 20:50:0052.685 N, 2.4133 ENot applicable
591879Currents -subsurface Eulerian1989-07-24 20:50:0052.685 N, 2.4133 ENot applicable
801208CTD or STD cast1989-08-23 18:09:0052.6855 N, 2.40767 ERRS Challenger CH59
1855892Water sample data1989-08-23 18:15:0052.68558 N, 2.40771 ERRS Challenger CH59
248829Currents -subsurface Eulerian1989-08-23 20:30:0052.6837 N, 2.4112 ENot applicable
591947Currents -subsurface Eulerian1989-08-23 20:30:0052.6837 N, 2.4112 ENot applicable
248448Currents -subsurface Eulerian1989-08-23 20:33:0052.6837 N, 2.4112 ENot applicable
799860CTD or STD cast1989-09-21 19:30:0052.68917 N, 2.41983 ERRS Challenger CH61
1854631Water sample data1989-09-21 19:35:0052.68916 N, 2.41982 ERRS Challenger CH61
802537CTD or STD cast1990-05-21 05:53:0052.6765 N, 2.42267 ERRS Challenger CH66A
804440CTD or STD cast1990-09-20 15:47:0052.689 N, 2.41367 ERRS Challenger CH72A