(1)Subject to subsection (5) below, a person commits an offence if he unlawfully and intentionally—
(a)destroys a ship or a fixed platform,
(b)damages a ship, its cargo or a fixed platform so as to endanger, or to be likely to endanger, the safe navigation of the ship, or as the case may be, the safety of the platform, or
(c)commits on board a ship or on a fixed platform an act of violence which is likely to endanger the safe navigation of the ship, or as the case may be, the safety of the platform.