46 CFR §137.310

1. (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. (1)Have the vessel examined by a surveyor from a TPO at the intervals prescribed in § 137.300;
   2. (2)Ensure the examination is conducted in accordance with § 137.325;
   3. (3)Ensure the TSMS applicable to the vessel includes policies and procedures for complying with this section; and
   4. (4)Make the applicable sections of the TSMS available to the surveyor.
2. (b)The drydock examination and internal structural examination must be documented in a report that contains the information required in § 137.135.