As long as your unit is in good condition and not leaking, it's safe to keep on board. Although both agents do pose some threat to the environment, it is considered to be substantially less than that of Halon. Their characteristically rapid extinguishing performance is considered by most to mitigate the detrimental effects of fire. Both require more agent by weight than Halon 1301 did, so your storage requirements for the extinguishers may increase. United States Coast Guard Minimum Equipment Requirements Coast Guard minimum equipment requirements vary with the size of the boat, type of propulsion, whether operated at night or in periods of reduced visibility, and, in some cases, the body of water on which it is used.
Boats carrying passengers for hire have additional equipment requirements.
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