Broad-Scale Station Protocol
The Broad-scale cruises will carry out CTD, zooplankton, fish larval
and acoustic surveys of Georges Bank and adjacent waters in addition to
the ship's suite of meterological measurements. On each survey cruise,
thirty nine (39) of these stations are called the "Standard Stations".
located to provide a uniform, bank-wide coverage. The remaining
stations are located equidistant between each pair of standard
stations. At these "in-between sites", Bongo tows will be taken. This new protocol
will be followed during the 1996 Broad-scale cruises. Other "in-between"
stations (i.e. off the straight line cruise track) have been identified
as desirable, but due to time constraints they cannot be routinely accomodated.
If extra cruise time is available, the chief scientist can decide to visit
these sites as well.
There are two types of standard stations defined for broad-scale
- full stations where MOCNESS1, MOCNESS10, CTD, Pump, and Bongo
data are collected;
- partial stations where Bongo, MOCNESS1 and CTD data are
Each "Standard Station" is assigned a priority number, from
1 to 4.
Priority 1 and 2 stations are "full stations" and priority 3 and 4
stations are "partial stations". Priority 1 stations are "more
important" than priority 2 stations, etc. If circumstances require the
chief scientist to drop any of the core stations (due to weather or
other ship delays) the Chief Scientist is requested to follow the
station priorities as show here. All intermediate stations are to
be viewed as having a priority of 5, that is, lower than the
Once the standard stations and intermediate stations are taken, the
Chief Scientist can return
to interesting areas for additional station work at his/her discretion.
However, given the length of the cruise, it is unlikely that there will
be sufficient time for any additional stations.
The following was proposed by David Mountain in May 1996:
- At the last ExCo I indicated that the next (and last for '96) broad scale
cruise would do ichthyoplankton bongos on track line, half way between the
established 39 standard stations. After discussing this with Wally Morse,
Peter Berrien and John Sibunka - after considering the catches on the May
survey - we have a different plan.
- Because most of the larvae will have become juveniles, the in-between bongos
would not be worth the time. Instead, the intent will be to do the 39 standard
stations, and to add a MOC 10 to all stations < 100m depth (about 15 or so
stations). This should maximize our sampling of the '96 cod and haddock
year classes - and on ALBATROSS IV take less time than the bongos would have
Note that in 1995, standard station #25 was on the Scotian Shelf
at -65.68 while in 1996 and thereafter it was moved westward to
-65.848 to be in the NE Channel.
For additional information, including a table of positions and their
priorities, see the Broad-Scale Station
Plan for 1996.
For the Broad-scale Station protocol used during the 1995 field year,
Last modified: December 16, 2003