§ Mr. Dalyellasked the Secretary of State for Defence if he will make a statement on the current availability of magnetic field and variation information for the Royal Navy; if he has any plans to increase this; and if he will make a statement.
§ Mr. StanleyMagnetic field and variation information is drawn from civil and military sources worldwide and is printed on all Admiralty charts. Magnetic field and variation charts are reissued every five years, and there are no plans to increase the frequency at which such information is updated.