Tonnage limitations for endorsements of less than 200 grt are issued in 50 ton increments, rounding up, as defined in 46 CFR 11.422:
- The endorsement is limited to the maximum tonnage on which at least 25 percent of the required experience was obtained, or 150 percent of the maximum tonnage on which at least 50 percent of the service was obtained, whichever is higher.
- When the qualifying service is obtained upon vessels of five gross tons or less, the officer endorsement will be limited to vessels of not more than 25 gross tons.
Example: Lets say you are applying for a Master near coastal endorsement. This endorsement requires 720 days of total sea service experience. To qualify for a 100 ton limitation you would need either 180 days on a vessel 51 tons or larger OR 360 days on a vessel greater than 34 tons or larger (150% of 34 tons is 51 tons).
The tonnage limitation on these endorsements may be raised upon completion of any of the following requirements:
- At least 45 days of additional service on deck on a vessel of a higher tonnage for a tonnage increase on a mate’s endorsement.
- At least 90 days of additional service on deck on a vessel of a higher tonnage for a tonnage increase on a master’s endorsement.
- Additional service, which, when combined with all previously accumulated service, will qualify the applicant for a higher tonnage officer endorsement under the basic formula.
- Six months additional service in the deck department on vessels within the highest tonnage increment on the officer’s license or MMC endorsement. In this case, the tonnage limitation may be raised one increment.