33 C.F.R. § 26.02
For the purpose of this part and interpreting the Act:
Act means the "Vessel Bridge-to-Bridge Radiotelephone Act", 33 U.S.C. sections 1201-1208 ;
Length is measured from end to end over the deck excluding sheer;
Power-driven vessel means any vessel propelled by machinery; and
Secretary means the Secretary of the Department in which the Coast Guard is operating;
Territorial sea means all waters as defined in § 2.22(a)(1) of this chapter.
Towing vessel means any commercial vessel engaged in towing another vessel astern, alongside, or by pushing ahead.
Vessel Traffic Services (VTS) means a service implemented under Part 161 of this chapter by the United States Coast Guard designed to improve the safety and efficiency of vessel traffic and to protect the environment. The VTS has the capability to interact with marine traffic and respond to traffic situations developing in the VTS area.
Vessel Traffic Service Area or VTS Area means the geographical area encompassing a specific VTS area of service as described in Part 161 of this chapter. This area of service may be subdivided into sectors for the purpose of allocating responsibility to individual Vessel Traffic Centers or to identify different operating requirements.
33 C.F.R. §26.02
Rule 1, International Regulations for Preventing Collisions at Sea, 1972 (as rectified); E.O. 11964 (14 U.S.C. 102 ); 49 CFR 1.46(b)
Although regulatory jurisdiction is limited to the navigable waters of the United States, certain vessels will be encouraged or may be required, as a condition of port entry, to report beyond this area to facilitate traffic management within the VTS area.