Another boat question

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We tried to get to the halibut hole yesterday but the bar was a little too rough. We piddled in the harbor and the marina mostly.

Here’s a question; what do ya’ll do with these expired flare cartridges? I can’t imagine hanging on to bunches of them is a good idea and tossing them in the rubbish is equally bad. I carry two sets of old ones as backup but I’ve got ‘em from 2011!