[QUOTE=tugsailor;171887]I think you are right. I assume that anyone with Master 1600 and Master of Towing can run a towing vessel up to 1600 GRT, but I have never seen a regulation that clearly answers that question.
For that matter, I have not seen a regulation that says that anyone with Master 1600 would need Master of Towing or a Toar, in order to run an inspected tug over 300 GRT.
Isn’t Toar only required to obtain Master or Mate of Towing for unispected vessels? Where does it say that Toar is necessary for service on an inspected towing vessel?[/QUOTE]
§15.910 Towing vessels.
No person may serve as a master or mate (pilot) of [B]any towing vessel[/B][B][I](inspected, uninspected)[/I][/B] without meeting the requirements of §§15.805(a)(5) or 15.810(d) of this part.
[USCG-2006-24371, 74 FR 11263, Mar. 16, 2009]
then
§15.805 Master.
(a) There must be an individual holding an appropriate license as or a valid MMC with endorsement as master in command of each of the following vessels:
(1) Every self-propelled, seagoing documented vessel of 200 GRT and over.
(2) Every self-propelled inspected vessel;
(3) Every inspected passenger vessel;
(4) Every inspected small passenger vessel; and
(5) [B]Every towing vessel of at least 8 meters (26 feet) or more in length must be in command of a master of towing vessels, or a mariner holding a license or MMC endorsed as master of inspected, self-propelled vessels greater than 200 GRT holding either—[/B]
B A completed Towing Officer’s Assessment Record (TOAR), bearing the signature of a Designated Examiner and stating that the Examiner found the candidate proficient; or
(ii) A license or MMC endorsed for master of towing vessels.[/B]