The Simrad PI Mini-R is an "S-Type" sensor. It is approximately 250 mm long, 140 mm wide, and weighs approximately 3 kg in air. The "Mini-R" responders must be used in sets of two: 1+3 and 2+4.
Red colour identifies the port responder, while green colour identifies the starboard responder.
This is a sacrificial bolt. It will gradually be worn out. Check it from time to time to remove corrosion, or replace it if necessary.
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