46 CFR 15.860: Tank vessel endorsements for crew
Last reviewed: October 14, 2026
This section sets the tank vessel endorsements that crew on manned tank vessels must hold on their MMCs. The OCMI enters the required number of endorsed crewmembers on the COI. Minimum numbers depend on the type of tankship, its tonnage and its crew size.
Applies toIt applies to manned tank vessels subject to the regulations in this chapter, including tankships and tank barges.
What it says
The OCMI enters on the COI of each manned tank vessel the number of crewmembers who must hold valid MMCs with the proper tank vessel endorsement.
46 CFR 15.860(a)“The OCMI enters on the COI issued to each manned tank vessel subject to the regulations in this chapter the number of crewmembers required to hold valid MMCs with the proper tank vessel endorsement.”
A tankship of more than 5,000 GRT certified for voyages beyond the boundary line must carry at least two Tank Vessel-PICs or Restricted Tank Vessel-PICs.
46 CFR 15.860(b)(1)“At least two Tank Vessel-PICs or Restricted Tank Vessel-PICs must be carried;”
A tankship of more than 5,000 GRT certified for voyages beyond the boundary line must also carry at least three Tank Vessel-Assistants.
46 CFR 15.860(b)(2)“At least three Tank Vessel-Assistants must be carried; and”
A tankship of 5,000 GRT or less certified for voyages beyond the boundary line must carry at least two Tank Vessel-Engineers, unless only one engineer is required. In that case it must carry at least one Tank Vessel-Engineer.
46 CFR 15.860(c)(2)“At least two Tank Vessel-Engineers must be carried, unless only one engineer is required, in which case at least one Tank Vessel-Engineer must be carried.”
A tankship not certified for voyages beyond the boundary line must carry at least one Tank Vessel-PIC or Restricted Tank Vessel-PIC if the total crew complement is one or two.
46 CFR 15.860(d)(1)“One or two, at least one Tank Vessel-PIC or Restricted Tank Vessel-PIC must be carried; or”
On a tankship certified for voyages beyond the boundary line, the Master and Chief Mate must each hold a Tank Vessel-PIC or Restricted Tank Vessel-PIC endorsement.
46 CFR 15.860(f)(1)“The Master and Chief Mate must each hold a Tank Vessel-PIC or Restricted Tank Vessel-PIC endorsement.”
The endorsements required by this section must be for the classification of the liquid cargo in bulk or of the cargo residue being carried.
46 CFR 15.860(g)“The endorsements required by this section must be for the classification of the liquid cargo in bulk or of the cargo residue being carried.”
All individuals serving on tankships certified for voyages beyond the boundary line must hold an appropriate STCW endorsement.
46 CFR 15.860(h)“must hold an appropriate STCW endorsement, as follows:”
Common questions
Who decides how many tank vessel endorsements a manned tank vessel needs?
The OCMI enters the number of crewmembers who must hold the proper tank vessel endorsement on the COI of each manned tank vessel.
“The OCMI enters on the COI issued to each manned tank vessel subject to the regulations in this chapter the number of crewmembers required to hold valid MMCs with the proper tank vessel endorsement.”
How many Tank Vessel-PICs does a tankship need if it is not certified beyond the boundary line?
With a crew complement of one or two, it needs at least one Tank Vessel-PIC or Restricted Tank Vessel-PIC. With more than two, it needs at least two.
“More than two, at least two Tank Vessel-PICs or Restricted Tank Vessel-PICs must be carried.”
Which endorsement must a Tank Vessel-Assistant hold under STCW?
A Tank Vessel-Assistant on a tankship certified for voyages beyond the boundary line must hold an STCW endorsement as Basic Oil and Chemical Tanker Cargo Operations, or Basic Liquefied Gas Tanker Cargo Operations, as appropriate.
“For Tank Vessel-Assistant, an STCW endorsement as Basic Oil and Chemical Tanker Cargo Operations, or Basic Liquefied Gas Tanker Cargo Operations, as appropriate.”
The text of 46 CFR 15.860
Electronic Code of Federal Regulations (eCFR), current as of April 16, 2026 · Read it on eCFR
Tank vessel endorsements
(a) The OCMI enters on the COI issued to each manned tank vessel subject to the regulations in this chapter the number of crewmembers required to hold valid MMCs with the proper tank vessel endorsement. Table 1 to § 15.860(a) of this section provides the minimum requirements for manned tank vessels. Table 2 to § 15.860(a) of this section provides the tank vessel endorsements required for personnel aboard tankships.
Table 1 to § 15.860(a)—Minimum Requirements for Manned Tank Vessels Tank vessels Tank vessel-PIC Tank Vessel-assistant Tank Vessel-engineer Tank Vessel-PIC or tank barge-PIC Tankship Certified for Voyages Beyond Boundary Line: Over 5,000 GRT 2 3 2 5,000 GRT or less 2 1 2 Tankship Not Certified for Voyages Beyond Boundary Line 2 2 Tank Barge 2 2 1 If only one engineer is required, then only one Tank Vessel-Engineer is required. 2 If the total crew complement is one or two persons, then only one Tank Vessel-PIC is required. 3 If the total crew complement is one or two persons, then only one Tank Vessel-PIC or Tank Barge-PIC is required.
Table 2 to § 15.860(a)—Tank Vessel Endorsements Required for Personnel Aboard Tankships[Endorsement for the classification of the bulk liquid cargo or residues carried] Tankship certified for voyages beyond boundary line Tank vessel-PIC Tank vessel-engineer Tank vessel-assistant Master X Chief Mate X Chief Engineer X or X First Assistant Engineer X or X Cargo Engineer X or X Credentialed officer Acting as PIC of Transfer of Liquid Cargo in Bulk X Credentialed Officer or Crewmember Not Directly Supervised by PIC X
(b) For each tankship of more than 5,000 GRT certified for voyages beyond the boundary line as described in part 7 of this chapter—
(1) At least two Tank Vessel-PICs or Restricted Tank Vessel-PICs must be carried;
(2) At least three Tank Vessel-Assistants must be carried; and
(3) At least two Tank Vessel-Engineers must be carried.
(c) For each tankship of 5,000 GRT or less certified for voyages beyond the boundary line, as described in part 7 of this chapter
(1) At least two Tank Vessel-PICs or Restricted Tank Vessel-PICs must be carried; and
(2) At least two Tank Vessel-Engineers must be carried, unless only one engineer is required, in which case at least one Tank Vessel-Engineer must be carried.
(d) For each tankship not certified for voyages beyond the boundary line, as described in part 7 of this chapter, if the total crew complement is—
(1) One or two, at least one Tank Vessel-PIC or Restricted Tank Vessel-PIC must be carried; or
(2) More than two, at least two Tank Vessel-PICs or Restricted Tank Vessel-PICs must be carried.
(e) For each Tank Barge-PIC manned under § 31.15-5 of this chapter, if the total crew complement is—
(1) One or two, at least one Tank Vessel-PIC, restricted Tank Vessel-PIC, Tank Barge-PIC, or Restricted Tank Barge-PIC must be carried; or
(2) More than two, at least two Tank Vessel-PICs, Restricted Tank Vessel-PICs, Tank Barge-PICs, or Restricted Tank Barge-PICs must be carried.
(f) The following personnel aboard each tankship certified for voyages beyond the boundary line, as described in part 7 of this chapter, must hold valid MMCs, endorsed as follows:
(1) The Master and Chief Mate must each hold a Tank Vessel-PIC or Restricted Tank Vessel-PIC endorsement.
(2) The Chief, First Assistant, and cargo engineers must each hold a Tank Vessel-Engineer or Tank Vessel-PIC endorsement.
(3) Each credentialed officer acting as the PIC of a transfer of liquid cargo in bulk must hold a Tank Vessel-PIC or Restricted Tank Vessel-PIC endorsement.
(4) Each officer or crewmember who is assigned by the PIC duties and responsibilities related to the cargo or cargo-handling equipment during a transfer of liquid cargo in bulk, but is not directly supervised by the PIC, must hold a Tank Vessel-Assistant endorsement.
(g) The endorsements required by this section must be for the classification of the liquid cargo in bulk or of the cargo residue being carried.
(h) All individuals serving on tankships certified for voyages beyond the boundary line, as described in part 7 of this chapter, must hold an appropriate STCW endorsement, as follows:
(1) For Tank Vessel-PIC, an STCW endorsement as Advanced Oil Tanker Cargo Operations, Advanced Chemical Tanker Cargo Operations, or Advanced Liquefied Gas Tanker Cargo Operations, as appropriate.
(2) For Tank Vessel-Assistant, an STCW endorsement as Basic Oil and Chemical Tanker Cargo Operations, or Basic Liquefied Gas Tanker Cargo Operations, as appropriate.
(3) For a Tank Barge-PIC, an STCW endorsement as Advanced Oil Tanker Cargo Operations, Advanced Chemical Tanker Cargo Operations, or Advanced Liquefied Gas Tanker Cargo Operations, as appropriate, including endorsements with a limitation for non-self-propelled vessels.
(4) For a Tank Vessel-Engineer, an STCW endorsement as Advanced Oil Tanker Cargo Operations, or Advanced Chemical Tanker Cargo Operations, as appropriate, including endorsements with a limitation to maintenance and repair of cargo equipment.
Sections it refers to
The plain-English explanation on this page was written with AI from the regulation text above and checked automatically before publishing: every quote appears in the text, every number comes from it, and a second model confirmed each statement adds nothing the text doesn't say. Regulation text current as of April 16, 2026. The regulation text governs. RegKnot is not affiliated with the U.S. Coast Guard.