Is Delaware the right registration?
Delaware registration is a US state registration. It should not be described as equivalent to federal US Coast Guard documentation or as automatic proof of title.
The boat's ownership, principal use, residence or business connection and intended cruising area must be reviewed under current state rules before the application is accepted.
Owners with a legitimate Delaware registration basis who understand the difference between state registration, title and federal documentation.
You are seeking a universal flag solely to avoid the rules of the place where the boat is actually owned, kept or operated.