46 C.F.R. § 50.10-30
Coast Guard number.
Cite as 46 C.F.R. § 50.10-30 (2026)
(a) The Coast Guard number means that number assigned to boilers and pressure vessels by the Officer in Charge, Marine Inspection, who makes the final tests and inspections.
(b) The Coast Guard number must be stamped on the nameplates of boilers and pressure vessels.
(c) The Coast Guard number is comprised of the following:
(1) Three capital letters which identify the office of the issuing Officer in Charge, Marine Inspection (see table 1 to § 50.10-30); followed by,
(2) An OCMI serial number, by which the particular boiler or pressure vessel can be identified; the first two digits of which will identify the calendar year the number was assigned.
Table 1 to § 50.10-30—Previous Sector Office Identification Letters in Coast Guard Numbers for Boilers and Pressure Vessels
Identification
Sector
Office
ALB
Albany.
ANC
Anchorage.
BAL
Baltimore.
BOS
Boston.
BUF
Buffalo.
CHA
Charleston.
CHI
Chicago.
CIN
Cincinnati.
CLE
Cleveland.
COR
Corpus Christi.
DET
Detroit.
DUL
Duluth.
GAL
Galveston.
GUA
Guam.
HON
Honolulu.
HOU
Houston.
HRV
Hampton Roads, VA.
HUN
Huntington.
JAC
Jacksonville.
JUN
Juneau.
LIS
Long Island.
LOS
Los Angeles.
LOU
Louisville.
MEM
Memphis.
MIA
Miami.
MIL
Milwaukee.
MIN
Minneapolis.
MOB
Mobile.
MOR
Morgan City.
NAS
Nashville.
NEW
New Orleans.
NYC
New York.
PAD
Paducah.
PAT
Port Arthur.
PHI
Philadelphia.
PIT
Pittsburgh.
POM
Portland, ME.
POR
Portland, OR.
PRO
Providence.
ROT
Rotterdam.
SAV
Savannah.
SDC
San Diego.
SEA
Seattle.
SFC
San Francisco.
SIM
Saint Ignace.
SJP
San Juan.
SLM
St. Louis.
STB
Sturgeon Bay.
TAM
Tampa.
TOL
Toledo.
VAL
Valdez.
WNC
Wilmington, NC.
[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGFR 69-127, 35 FR 9975, June 17, 1970; CGD 74-219, 39 FR 40158, Nov. 14, 1974; CGD 78-161, 44 FR 13492, Mar. 12, 1979; USCG-2000-7790, 65 FR 58459, Sept. 29, 2000; USCG-2006-25556, 72 FR 36330, July 2, 2007; USCG-2020-0634, 89 FR 50094, June 12, 2024]
- Cross-references to the CFR
- 50.10-30