PART V STABILITY AND SHIPSIDE MARKINGS

41 Automatic draught gauge system
1 Every ship of Class II shall be provided with a reliable automatic draught gauge system.
2 (a) Every ship of Class I or II(A) engaged on services which afford only short periods in port or where insufficient lighting is available during periods of darkness, or which include the use of berths exposed to adverse weather, shall be provided with a reliable automatic draught gauge system as prescribed in paragraph (1).
(b) Every other ship of Class I or II(A) shall be provided with such an automatic draught gauge system, except where the draught marks are located where they can be easily read.