Code of Federal Regulations Title 46. Shipping § 46.154.1340 Temperature measuring devices

(1) At the bottom of the tank;  and

(2) Near the top of the tank and below the maximum liquid level allowed under § 154.1844.

(1) The number and location of the devices must be specially approved by the Commandant (CG–OES).

(2) The devices must be within the cargo tank's insulation or on the adjacent hull structure.

(3) Each device must show the temperature continuously or at regular intervals of one hour or less.

(4) Each device must actuate an audible and visual alarm at the cargo control station and a remote group alarm in the wheelhouse before the temperature of the steel of the adjacent hull structure is cooled below the lowest temperature allowed for the steel under § 154.172.