46 CFR 137.310: External survey program.

(a) The owner or managing operator of a towing vessel that has selected the TSMS option and who has chosen to demonstrates compliance through an external survey program must:

(1) Have the vessel examined by a surveyor from a TPO at the intervals prescribed in § 137.300;

(2) Ensure the examination is conducted in accordance with § 137.325;

(3) Ensure the TSMS applicable to the vessel includes policies and procedures for complying with this section; and

(4) Make the applicable sections of the TSMS available to the surveyor.

(b) The drydock examination and internal structural examination must be documented in a report that contains the information required in § 137.135.