Speed log dummy impeller unit
Spare dummy log impeller
Fit this in place of the logs impeller unit if you leave the boat, this will keep the bore free from marine growth.
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AIS Engine 3 upgrade processor
The AIS Engine 1 and 2 can be upgraded to AIS Engine 3 specification by replacing the processor. This is a straightforward procedure where the old device is simply unplugged from its socket and replaced by the new device. AIS Engine 3 relays all AIS messages.