Legislation measures
A deposit system can work very effectively for larger items, whereas small items that are lost very frequently (because these are light, cheap and their retrieval is considered to be a waste of time) should be replaced by alternatives and, in case this is not possible, their use should be closely linked to awareness-raising and training of the e.g. staff responsible for installation.
Regulations
Relevant type of aquaculture:
Relevant sea basin:
Relevant stage: