Section 24(3) in The Merchant Shipping (Crew Accommodation) Rules, 1960
(3)The hot fresh water shall be at a constant temperature of at least 65.50 C and shall be supplied by thermostatically controlled calorifiers or by other equally safe and efficient means. Every shower bath shall be provided with an anti-scalding mixing valve which shall be adjusted so that the temperature of the shower-water (whether salt or fresh) can be varied by the person using a shower over the range of temperatures and a temperature of between 350 C and 40.50C.
