User guide

FS 20/25 Operators Manual 901-10037001/1.1

System Familiarization Page 1.

Kongsberg Simrad Mesotech Ltd.

Port Coquitlam, BC - Canada

1.1.10 Sounder Option

The FS 20/25 HP PC is configured to output NMEA 183 data information. When a

sensor module is included in the system, the depth and temperature output are

transmitted to the processor and displayed on the monitor. When interfaced to the

Simrad EQ 55 or ES 60 color sounder, the headrope and the footrope information

appears on the sounder, showing the location of the trawl in relation to the fish or

bottom returns.

1.1.11 VCR Option

The FS 20/25 HP PC processor video adapter provides S-Video and NTSC

composite video output. This allows the operator to record the sonar image by

connecting a VCR, instead of the second monitor, on the video output “2” using the

special adapter cable included with the system.

1.1.12 Trawl Cable, Winch and Block

The trawl cable is chosen for maximum mechanical strength, durability and

maximum attenuation of the signals. Cables in common use are coaxial with

breaking points of 1500kg. and 6000kg.

Cable winches are delivered in different types and with different capacities; low-

pressure hydraulic, high-pressure hydraulic and electrically driven. Choice of winch

is dependent on prevailing conditions; type and length of cable and available source

of power. Most types operate automatically - the cable is pulled out, kept tight during

towing, and hauled in together with the trawl. Control of the winch is done remotely

from the bridge.

Any commercially available pulley block may be used to properly align the cable

onto the winch. A snatch block has the advantage that it may be installed without

having to thread the cable through it. A unit with two movable steering arms (one on

each side of the pulley) is recommended to prevent the cable from coming off the

pulley and causing damage to the cable.