What conditions must be met by a rating on a UK ship before issue with a Navigational Watch Rating Certificate under STCW Code A-II/4?

 (1) at least 17 years old; (2) have completed approved sea-going service in the deck department of at least 6 months, or 2 months if an MCA-approved special training programme has been completed; (3) have completed basic safety training; (4) have been assessed as meeting the requirements and performance standards of STCW Code A-II/4; and (5) hold a valid Medical Fitness Certificate. (MIN303, 2. 2)