Coast-guard ship design begins with jurisdiction and threat

What would the ultimate coast-guard ship look like?

It depends on the country: Britain needs a seakindly patrol and boarding platform, while Pacific services may need greater range, size, and armament.

Coast-guard requirements depend on the country and its patrol duties. A British design could be around 2,500 tons, with a helicopter, rapidly deployable rigid inflatables, and secure accommodation for people taken aboard. It should patrol for days and cope with North Atlantic conditions, while long range and high speed would be less important. Diesel or diesel-electric propulsion is suggested. Canada, Australia, and the United States require different scales of ship, while regular confrontation with the Chinese Coast Guard could justify a 76 mm gun and additional weapons.