1308. Flight over water.

An aeroplane registered in the United Kingdom1 flying under and in accordance with a permission granted by the Civil Aviation Authority (CAA)2 and flying over water for the purpose of public transport3 must fly at such an altitude as would enable the aeroplane if it has one engine only, in the event of the failure of that engine or, if it has more than one engine, in the event of the failure of one of those engines and with the remaining engine or engines operating within the maximum continuous power conditions specified in the certificate of airworthiness or flight