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 ~10 meters
from bottom or a maximum tow depth of 500 meters. The winch
rates for retrieval is ~5m/min.
Try to filter at least 4,000 - 5,000m**3 of water per depth stratum
sampled (this inclues net #0 - the "down net").
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 Stbd 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. After the second command to stop net is executed,
watch for a large (several degree) wire angle change on the
monitor, then manually increment "NET #" displayed on screen.
- 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
M01 = Identifies the gear to be fished, in the example M01
represents the 1-meter MOCNESS; if the 10-meter MOCNESS is
to be fished, enter M10
001 = 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, delete the files
(*.pro, *.raw, *.tab, where * represents the file name for this tow).
Manager" in Windows to accomplish this.
April 1, 1996
February 2, 1996>
February 2, 1995