I have recently become involved in Kayak Fishing and one of the "must have" toys it seems is a combined Fish finder/GPS.
Most seem to go with the Humminbird or Lowrance models but I'd be interested to know if there are any others out there that use OpenSource maps(marine). The units need to be quite small and preferably a combo unit but if I need to go for separate units I'll probably opt for a small mounted fish finder and possible a separate GPS provided it has decent Open Sourcemarine charts available.
Anyone here have any suggestions worth investigating further? I don't know if either the Humminbird or Lowrance accept Open Source maps