I have the display instrument for a Datamarine knotmeter
(which also records trio distance). I also have a Datamarine A-181 log control panel
, which records trip and total distance. It comes with a little plywood
mounting box that you can use or not. The knot
meter has a little wear on it (cosmetic) and was working when I took it out of the boat
. The log is in beautiful condition.
Included is the cable that links the two of them. You will need your own transducer
, but the DMI website can get you the specs for that - there are a few suppliers that have standard transducers that will work