Recently we were anchored by Tanera Mor in the Summer Isles and the 9 fish farm cages in the bay were constantly putting out a very audible clicking (like a cricket) noise which was quite loud down below deck. This was the first time that we have been consciously aware of this noise pollution.

Then on Sunday night, BBC Countryfile had a very good item on the proliferating use of these Acoustic Deterrent Devices (ADD) which scare off all marine mammals who use sonar to communicate and hunt. The fish farm representative could not answer the direct questions and kept saying "we need further evidence" despite its own expert consultants confirming the deleterious effects on seals, porpoises, dolphins and whales (he forgot to mention us ).

If it is annoying for us in the boat, think what it is like for the marine animals.