Floating armouries - ships packed to the gunnels with machineguns, ammunition and other military equipment - are operating in international waters with a "worrying lack" of regulation, warns a report that says the vessels could pose a threat to regional peace and stability.
The armouries were set up to supply private security guards employed to protect shipping from pirates, particularly off the East African coast. The report, commissioned by the Remote Control Project, a body that raises awareness of new military trends, said there was an "urgent need" for an international agreement to set minimum standards.
It also said there should be frequent safety checks and firms should not be allowed to use flags of convenience issued by nations blacklisted for low maritime standards. The number of floating armouries is unknown as no international register exists.
The report, written by the Omega Research Foundation think-tank, lists 33 vessels, but there could be more. Eight sail under the flag of landlocked and blacklisted Mongolia.
The report noted the United Nations Monitoring Group on Somalia and Eritrea had "raised concerns that ... floating armouries and private maritime security companies could represent a threat to regional peace and stability.