Section 11.457 - Requirements for master of inland self-propelled vessels of less than 100 GRT(a) An applicant for an endorsement as master of inland self-propelled vessels of less than 100 GRT must present 1 year of service on any waters. In order to raise the tonnage limitation to more than 100 GRT, the examination topics indicated in subpart I of this part must be completed in addition to satisfying the experience requirements of § 11.452(a) of this subpart.(b) To obtain an endorsement for sail or auxiliary sail vessels, the applicant must submit evidence of 6 months of service on sail or auxiliary sail vessels. The required 6 months of service may have been obtained prior to issuance of the license or MMC endorsement.(c) All endorsements issued for master or mate of vessels of less than 100 GRT are issued in tonnage increments based on the applicant's qualifying experience in accordance with the provisions of § 11.422 of this subpart.