New Boat - Transducer/Sonar Advice

[HBrew]

Hello, I am planning a new Furuno installation on a new sailing boat and looking for advice about transponder/sonar options.
Here is the config:
2 x TZT12F MFD's (one for each helm, although only one will be used at a time, so direct connect of transducer to one of the MFD's will not work)
Hub-102 + DRS2DNXT + SC33 + Timezero on laptop connected to Hub-102
My priority is reliable depth/water speed/water temp - seems like 525STID-MSD7 might be a good option. I would like to have depth info without switching on a MFD (to save power) when at anchor as I use Timezero on the laptop as my anchor watch alarm for position and depth.
As a secondary priority, it would be nice to have visibility of the bottom and as I understand it, the DFF3D can do this as well as DFF3-UHD and they could connect direct to the Hub-102. Would I need an additional transducer for this?
Thanks in advance for any assistance.

 

[Quitsa]

How deep do you need to be able to read depth? An Airmar DST 810 can read down to about 300 feet and would connect to your NMEA 2000 network and thus STW, depth, and temperature would be accessible to anything else on the network. The GPS will give you speed over the ground. As a former long-time cruising sailor, I know it is very helpful to have speed through the water for sail trim and many other purposes. If you need to read greater depth, you could also get a B117 and connect it to one of the TZT12Fs or to a BBDS1 if you want it on the ethernet and available when only one MFDs turned on, though that strikes me as needless expense. You can just leave both MFDs powered up and dim the screen connected to the transducer when you need the depth data from it and are using the other MFD. The low frequency on the B117 should read down to 1000-1200 feet. Obviously you wouldn't be anchored in those depths and could use the data from the DS810 with your TimeZsro for anchor watch. Both the DST810 and the B117 have wide cone angles and should work pretty well under sail with the boat heeled, although that is always a challenge with sailboats when in deep water.