Dangled Anodes

[JackFrobisher]

I'm planning to move from GRP (sail) to steel (motor), which will be used in both fresh and salt water; mostly fresh with forays of two weeks or so in salt. Having researched (here mostly) appropriate anodes, I'm interested in "dangled" anodes and I'm wondering if they are the answer to moving between salt and fresh without the need to haul out and change anodes and would appreciate some advice...
1. Is it reasonable or sensible to replace bolted-on anodes with dangled ones?
2. If so how many/how big?
3. How is the inboard end best attached and is there a sweet spot for it?
4. What sort of cable would be needed?
5. I'm assuming that they wouldn't be deployed on passage because of the risk of damage - would a few hours unprotected matter?

 

[Tranona]

Depends on what you are trying to protect. For that pattern of use suggest you assume fresh water, so magnesium or aluminium anodes. For times in salt water protect stern gear and rudders (if necessary) with hanging zinc bonded with stainless steel cable. Problem with hanging anodes is getting them close to the things they are protecting. Not sure there would be any need for extra anodes if you have them for the hull.

Worth talking to MG Duff for their advice.

 

[JackFrobisher]

Problem with hanging anodes is getting them close to the things they are protecting.

Thanks. By "close to" do you mean the proximity of the anode itself or the proximity of the termination of the s/s cable?