Regle pokersvit 1 2 3 4 5
2.5 All ships of 500 gross tonnage and upwards shall, in addition to meeting the requirements of paragraph 2.3 with the exception of paragraphs 2.3.3 and 2.3.5, and the requirements of paragraph 2.4, have: .1 a gyro compass, or other means, to determine and display their heading by shipborne non-magnetic means and to