Some reality here... NZ currently has managed isolation for about 250 people a day arriving. Even that is stretched.
Regardless of any claims by people arriving from the Pacific, they would need to isolate. We have no capability to oversee isolation of people outside the managed sites, let alone manage isolation of people living aboard. A complicating factor is that, if we were to announce that the boarder was open ot cruising yachts etc, that status would be near impossible to reverse quickly - a sailor who has committed and departed for New Zealand on a 10 day to 3 week voyage from