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sendicott

Thanks for the feedback Chuck.
Q1. As far as the ST40 goes, I believe from the PO, they are not daisy chained at all, but a direct run from each transducer to the two instruments (speed & depth).
A1. The daisy chain which I had been referring to is with respect to how they are powered, not how the transducers were connected to the instruments. In a small system such as you present one, it would have not been uncommon to have had both instrument interfaced to a D244 SeaTalk Junction Block to which a SeaTalk Power Cable or SeaTalk Auxiliary Junction Box would have been connected.
R1: I will have to take a look next time I go down. It is on the hard right now undergoing fiberglass repairs, so I can access pretty much anywhere on the boat to look. In the years I have owned her, I have never noticed a junction block, but honestly, I have never looked. Would it be required? Could they have ran the depth transducer directly to the depth instrument and the same as the speed/temp setup too?

Q2. In my research of trying to discover my solution I may have stumbled onto a different solution I may like better. I am now considering an i70s system pack instead of the i50/i60 combo. If I went that route, everything would be contained in one unit. I guess I'd need to figure out what to put in the place of one of the ST40 units. :-)
A2. This is certainly an alternative to dedicated instrument displays. Should it be desirable to reduce the system to two displays, then you may also want to consider an i60 Wind System and an i50 Tridata Instrument (E70060 Display-Only) to use with your currently installed depth and speed/temp transducers.
R2: That was my original intent, until I saw the i70. My original plan was to use the i50 with existing transducers and the i60 for wind. As long as the ST 40 Transducers work with the i50s, then that may not be a bad idea either.

Q3. Does the i70s system have a built in digital compass as well, or only when hooked up to a Fluxgate Compass? The pictures show a compass heading, but what I cant figure out is what is "connected" in the sales photo.
A3. While the i70S MFID is capable of displaying heading data should it be interfaced to a source of heading data (ex. EV-1/2 CCU, iTC-5 w/fluxgate compass transducer), the i70S System Pack lacks the fluxgate compass which would minimally be required to permit the system which you have specified to additionally display heading data.
R3: Understood. Maybe I will just put an clinometer over the empty [censored].

Thanks,

Steve E.