I don't have a decent picture of the cockpit bulkheads, since it's hardly the most attractive part of the boat - this is the best I can find:
What I have now:
1. A Navman 3100 Depth display with no transducer.
2. A Raymarine B744V DST transducer not connected to anything.
I plan to lose the Navman, but whatever I buy MUST
use a B744V transducer. More holes and mods to the hull of a 60-year old yacht is simply not an option. These transducers are made by Airmar and come in several flavours:
Raymarine have a Fishfinder and an Instrument version. The Garmin one is an Instrument only version. I believe (maybe I'm wrong) that the last two are for Fishfinders.
AIRMAR Electronic Catalog
I'm not fussed about switching from Wind to Depth/Speed - actually, both Raymarine ST70 and Garmin GMI display both at once, so that point is irrelevant here. Tacktick would be ok if (a) it weren't so darned expensive, (b) they had some capability to connect to a B744V triducer and (c) they didn't insist on multiple displays like most everyone else.
It seems my cheapest option might be to cobble up a 2-display Raymarine ST40 solution, but that seems like a backward step if for an extra hundred$ or so I could get something NMEA2000-compatible and "modern".
Has anyone here used the Garmin GMI10 instruments? Does anyone know/have used Furuno or Lowrance instruments??