33 CFR 161.23 – Reporting exemptions
(a) Unless otherwise directed, the following vessels are exempted from providing Position and Final Reports due to the nature of their operation:
(1) Vessels on a published schedule and route;
(2) Vessels operating within an area of a radius of three nautical miles or less; or
(3) Vessels escorting another vessel or assisting another vessel in maneuvering procedures.
(b) A vessel described in paragraph (a) of this section must:
(1) Provide a Sailing Plan at least 5 minutes but not more than 15 minutes before navigating within the VMRS area; and
(2) If it departs from its promulgated schedule by more than 15 minutes or changes its limited operating area, make the established VMRS reports, or report as directed.