United Kingdom: further information

Where: On board vessels, as a voluntary aid primarily on light aircraft and on land.

Licence: Yes.  A ship radio licence is required for PLBs on vessels.  An aircraft radio licence is required for a PLB on aircraft. PLBs for use on Land are now licence Exempt in the United Kingdom when operated in accordance with our Exemption Regulations

http://www.legislation.gov.uk/uksi/2011/3035/pdfs/uksi_20113035_en.pdf

Certificate: It is a condition of both the ship and aircraft radio licences respectively that apparatus may only operated by those who hold an appropriate operator certificate.  However, in an emergency (where there is a risk to life), anyone may operate radio equipment to summon assistance.  The use of PLBs on land do not require a certificate.

Other:  All PLBs should be registered with the appropriate registry.

Free movement: The captain of any aircraft and the master of any vessel must be able to produce a valid licence for all radio apparatus installed in the aircraft or on the vessel