(a) This section contains the requirements to qualify for an endorsement authorizing a mariner to engage in assistance towing. Except as noted in this paragraph, holders of MMC officer and OUPV endorsements must have an assistance towing endorsement to engage in assistance towing. Holders of endorsements as master or mate (pilot) of towing vessels or master or mate endorsements authorizing service on inspected vessels of 200 GRT or more do not need the assistance towing endorsement.

(b) An applicant for an assistance towing endorsement must pass a written examination or complete a Coast Guard-approved course demonstrating his or her knowledge of assistance towing safety, equipment, and procedures.

(c) The holder of a license or MMC for master, mate, or operator endorsed for assistance towing is authorized to engage in assistance towing on any vessel within the scope of the license or MMC.

(d) The period of validity of the endorsement is the same as the license or MMC on which it is included, and it may be renewed with the MMC.