# The Firearms (Northern Ireland) Order 2004, Paragraph 4


(1) A person may, without holding a firearm certificate, have in his possession on board a ship a firearm as part of the equipment of the ship.
(2) A person may, without holding a firearm certificate—
(a) have in his possession on board an aircraft or at an aerodrome a signalling apparatus as part of the equipment of the aircraft or aerodrome;
(b) remove a signalling apparatus which is part of the equipment of an aircraft—
(i) from one aircraft to another at an aerodrome; or
(ii) from or to an aircraft at an aerodrome to or from a place appointed for its storage in safe custody at that aerodrome,
and keep any such apparatus at such a place.
(3) If he has obtained a permit from the Chief Constable, a person may, without holding a firearm certificate, remove—
(a) a firearm from or to a ship; or
(b) a signalling apparatus from or to an aircraft or aerodrome,
to or from a place and for a purpose specified in the permit.
(4) In this paragraph “firearm” and “signalling apparatus” include ammunition for a firearm or a signalling apparatus, as the case may be.

---
Source: https://www.legislation.gov.uk/ukdsi/2004/0110491327/schedule/1/paragraph/4 (the official version)
Page: https://openlegislation.uk/draft-firearms-northern-ireland-order-2004/schedule-1/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.