What are these disks on the hull?

[GILow]

Ah ha! You are all very clever forumites! Thank you!

I suddenly realised that I recognised the control box in the photo from stripping the boat. It had no label on it and was just a box of rusted out electronics with cut wires dangling from the bottom, so I tossed it out. (Actually, I assumed it had something to do with the powered Lewmar winch on the port side.)

So, two questions resolved with one post. Brilliant!

[GILow]

I've chipped off two so far.

No problems.... hang on... where did all that water come from?

[GILow]

[Jim Cate]

Originally Posted by GILow

Attachment 257619

When we bought Insatiable the first that very name was on her bow. I had a vision that was much like that picture and changed the name immediately. I am now convinced that I was correct in the interpretation!

Jim

[JPA Cate]

Had some friends with a steelie, who had troubles with barnacles in the intakes for their genset and main engine, who tried the ultrasonic discouragement method, and, reported that it worked!!! I was amazed, and wonder if anyone, anywhere has ever had success with it. They have them to supposedly repel fleas. Don't work. (she writes, scratching!)

Ann

[GILow]

Originally Posted by JPA Cate

Had some friends with a steelie, who had troubles with barnacles in the intakes for their genset and main engine, who tried the ultrasonic discouragement method, and, reported that it worked!!! I was amazed, and wonder if anyone, anywhere has ever had success with it. They have them to supposedly repel fleas. Don't work. (she writes, scratching!)

Ann

Even the fleas left the new boat in disgust at the living conditions.

[sailorladd]

My first, instinctive guess would be a hull closure on an old, defunct skin fitting...

[GILow]

Originally Posted by sailorladd

My first, instinctive guess would be a hull closure on an old, defunct skin fitting...

That was what I was worried about for sure. But the ultrasonics theory gave me the courage (just) to chip one away to see. And, Lo and behold, just plain fibreglass hull underneath.

I’ll admit it, tho, I was nervous.

[sailorladd]

Well there you go all's well that ends well...

[Kerryf]

I drive an aluminium boat that has hundreds of little plates like those epoxied to the hull. They all have metal spikes protruding from the middle. The insulation material is laid over the spikes and impaled onto the spikes. Then a one way washer pushed onto the spike to hold the insulation in place.

[GILow]

Originally Posted by Kerryf

I drive an aluminium boat that has hundreds of little plates like those epoxied to the hull. They all have metal spikes protruding from the middle. The insulation material is laid over the spikes and impaled onto the spikes. Then a one way washer pushed onto the spike to hold the insulation in place.

I know the sort you mean, I've run into them from time to time...sharp little buggers.