(a) Maintenance. The owner, master, or operator of each towing vessel shall maintain operative the navigational-safety equipment required by § 164.72.

(b) Failure. If any of the navigational-safety equipment required by § 164.72 fails during a voyage, the owner, master, or operator of the towing vessel shall exercise due diligence to repair it at the earliest practicable time. He or she shall enter its failure in the log or other record carried on board. The failure of equipment, in itself, does not constitute a violation of this rule; nor does it constitute unseaworthiness; nor does it obligate an owner, master, or operator to moor or anchor the vessel. However, the owner, master, or operator shall consider the state of the equipment - along with such factors as weather, visibility, traffic, and the dictates of good seamanship - in deciding whether it is safe for the vessel to proceed.

(c) Reporting. The owner, master, or operator of each towing vessel whose equipment is inoperative or otherwise impaired while the vessel is operating within a Vessel Traffic Service (VTS) Area shall report the fact as required by 33 CFR Table 161.18(a) row Q.

(d) Deviation and authorization. The owner, master, or operator of each towing vessel unable to repair within 96 hours an inoperative marine radar required by § 164.72(a) shall so notify the Captain of the Port (COTP) and shall seek from the COTP both a deviation from the requirements of this section and an authorization for continued operation in the area to be transited. Failure of redundant navigational-safety equipment, including but not limited to failure of one of two installed radars, where each satisfies § 164.72(a), does not necessitate either a deviation or an authorization.