11. In this Part—

“enforcement officer” means—

(a) a member of the Garda Síochána,

(b) an officer of customs (within the meaning of section 2 of the Customs Act 2015),

(c) a member of the Naval Service of the Defence Forces not below the rank of petty officer, or

(d) an immigration officer (within the meaning of section 3 of the Act of 2004);

“master”, in relation to a ship, means the person having, for the time being, the command or charge of the ship.