Heave Compensation?

[ship happens]

Thinking about the spending the money, worked and saved 40 years and can't take it with me.
I'll need the techy son-in-law to help set it up. Then he can inherit it.

Biggest issue is where to mount the transducer? I don't want to drill or weld onto the pod so was thinking about making a bracket and bolting it onto the divers plate bolts. Not sure if that will be an issue at speed with cavitation on the bracket. Boats on a trailer so don't want a big fairing block under the boat.
The DFF3D can go in the beer cuddy so will need to bring less beer or find another spot.

Drill a hole and mount a thruhull. Trust me you won't regret it.

 

[Sharphooks]

I purchased my boat pre-owned at it was all Garmin, from bow to stern. I’d thru-hull mount that DFF3D in a pocket mount if I had the space but there’s a GT51 mounted smack dab in the middle of the keel in the only access point for a through-hull and it would be a huge PITA removing it ….they’re not bad transducers, though…def hold clear picture at speed so I’ll leave it as is

If either of you guys want the (proper) faring block for the B54 (DFF3D) say the word and it’s yours

 

[ship happens]

If you ever upgrade I'll take first dibbs on the B51 though

 

[cpony]

I installed the B175hw when I purchased the tzt this year. Still trying to get it dialed in.
I would still need a PBG transducer.

 

[BC Coast Pilot]

I used to think that heave compensation was maybe having a Bloody Mary the next morning after a long night of swinging from the chandeliers with a lampshade on your head….

But yesterday, while testing out my new radar/sat compass installation, I found out what heave compensation is really all about.

After a long ordeal, I got the 24” Furuno and the SCX-20 sat compass firmly secured on the wheelhouse roof. The results (I got thick fog yesterday for the sea trial) were pretty stunnning

View attachment 109766





View attachment 109767


I decided to install the SCX-20 sat compass because at times, getting radar overlay on a chart is nice to have. An attribute I wasn’t expecting: What a handy tool heave compensation is when applied to sonar modules

I’ve had a DFF3D triple beam transducer that I’ve installed then taken off four boats over the years. It’s a huge transducer and can give good results though in my last three boats, the screen shots and targets were always a bit grainy (it hangs off the transom which it wasn’t designed for but that’s another story)

This was a screen-shot earlier this summer of the DFF3D triple-beam before adding the SCX-20. You can see how grainy the targets are

View attachment 109769


This was a screen shot of the triple beam I took yesterday using heave compensation from the SCX-20. It’s too bad there were no bait balls but you can see the clarity of the bottom returns. The wind was blowing, there were waves and side-ways rain, yet the SCX-20 kept the screen rock steady:
View attachment 109770


After that radar sat/compass installation that took a crazy amount of time to get things right, I celebrated with a Bloody Mary….. and then yesterday while out testing the Fish Gods rewarded me with a gift that I was absolutely not expecting :



View attachment 109771

Have you considered that you may get better reception and performance on that compass if you move it away from the radome shadow?