3-3
3.4 Placement of the Topside Processor
The two topside options for the 4125 system have different placement requirements within a vessel, and
these are detailed below:
3.4.1 4125-P Portable Topside Processor Placement
The 4125-P Portable Topside Processor can be located in a wet environment if the cover is kept closed.
Otherwise it should be located and set up in a dry, sheltered area that is protected from weather and
water spray, and where the temperature is consistently between 0°C and 40°C (32°F and 104°F). However,
avoid areas of direct sunlight, especially in tropical environments, as heat build-up could occur.
The location should also enable direct communications with the deck crew that is handling the towfish.
Secure the topside processor in place, using tie downs if necessary, near the required AC power source.
3.4.2 4125 Rack Mount Topside Processor
The 4125 Rack Mount Topside Processor should be installed in a sheltered 19” rack where it will not be
exposed to precipitation, sea spray, or extreme temperatures. It is also important that the unit be located
in a place where direct communication with the deck crew operating the towfish is possible.
3.5 Topside Controls and Indicators
Controls and indicators for the two topside processor options are in the following sub-sections.
3.5.1 4125-P Portable Topside Processor Controls and Indicators
The 4125-P Portable Topside Processor includes controls and indicators on the side panel as shown in
FIGURE 3-1.
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