I thought I found an oval anode on the port side, (about 1 meter from the stern) that looked unaffected by the seawater; it was completely covered with antifouling, so no surprise there.

But when I cleaned it, I found solid brass ( or bronze) It is attached with 2 bolts, which each hold a small zinc anode, recessed in the brass.

Size is about 15 x 7 cm.

Can anyone tell me what it is ?

Thank you !

It’s Chris from Sula, we corresponded last year and met by one of the locks close to your marina.

I put one of these on Sula, What you have found is I think a “keel Cooler” unit for your fridge, coolant pumps from cooling unit to the keel cooler, with the water cooling it down, ours works very well, and after research I went for this as being more efficient that a fan type cooler, also made installation easier.

I am away till Tuesday, but on a quick google search, I think I bought mine through penguin kuranda cooling, but can look up the details on what I bought if helpful, see link below.

https://penguin-kuranda....om-20-litres-to-380-litr 

Hopefully you can see the keel cooling unit on their website. I should add that the zinc anodes do need replacing, so keep an eye on them

Not heading to Holland this year, but maybe 2027

Hope this helps

Chris Day

P31 No. 5 SULA