10 Meter MOCNESS Towing Procedure For Globec Broadscale
- The 10-meter MOCNESS (MOC-10)sampler is loaded with five
3.0-mm mesh nets.
- MOC-10 tows are double oblique from surface to 15 meters
from bottom. The winch rates for retrieval is ~5m/min.
Try to filter at least 4,000 - 5,000m**3 of water per depth stratum
sampled. To achieve this a step-oblique tow profile during
retrieval may be necessary. Try to space the varioius 'steps'
equally within each depth stratum
- Nets are tripped "on the fly" and the computer command is
initiated at ~3 meters from the next designated depth strata to
be fished. Note that the computer program command to "Step Net"
must be activated twice (allow steps 1-3 to occur then mouse
click for steps 1-3 again) as the cam on the MOC-10 frame is set
at six clicks.
- At the completion of the tow, when the MOC-10 is at the
surface, any nets not fished must be tripped and released before
the sampler is brought aboard the vessel.
- When entering station/tow information in the MOCNESS windows
program before a cast is made, the format in designating a file
name is similar to the following example
42 = consecutive station number of cruise
M1 = Identifies the gear to be fished, in the example M1
represents the 1-meter MOCNESS; if the 10-meter MOCNESS is
to be fished, enter M10
_ = underscore (not a space), to separate sets of numbers
14 = consecutive haul number for the gear (either for MOC1 or
MOC10) fished for the cruise
- If a MOCNESS tow is aborted and a retow is made, a new file
name must be entered with the next consecutive haul number. Data
collected for a corresponding filename already used cannot be
overwritten, only added to.
Last modified: February 2, 1996>
February 2, 1995