The boards of local inspectors shall license and classify the masters, chief mates, and second and third mates, if in charge of a watch, engineers, and pilots of all steam vessels, and the masters of sail vessels of over seven hundred gross tons, and all other vessels of over one hundred gross tons carrying passengers for hire. It shall be unlawful to employ any person, or for any person to serve, as a master, chief mate, engineer, or pilot of any steamer or as master of any sail vessel of over seven hundred gross tons, or of any other vessel of over one hundred gross tons carrying passengers for hire, who is not licensed by the inspectors; and anyone violating this section shall be liable to a penalty of one hundred dollars for each offense. [See act June 9, 1910, p. 351.] (R. S., 4438; Dec. 21, 1898; Jan. 25, 1907; May 28, 1908; sec. 2.) Every master, mate, engineer, and pilot who shall receive a license shall, when employed upon any vessel, within forty-eight hours after going on duty, place his certificate of license, which shall be framed under glass, in some conspicuous place in such vessel, where it can be seen by passengers and others at all times: _Provided_, That in case of emergency such officer may be transferred to another vessel of the same owners for a period not exceeding forty-eight hours without the transfer of his license to such other vessel; and for every neglect to comply with this provision by any such master, mate, engineer, or pilot, he shall be subject to a fine of one hundred dollars, or to the revocation of his license. [See act June 9, 1910, p. 351.] (R. S., 4446; Feb. 19, 1907.) Master's license. Whenever any person applies to be licensed as master of any steam vessel, or of a sail vessel of over seven hundred tons, the inspectors shall make diligent inquiry as to his character, and shall carefully examine the applicant as well as the proofs which he presents in support of his claim, and if they are satisfied that his capacity, experience, habits of life, and character are such as warrant the belief that he can safely be intrusted with the duties and responsibilities of the station for which he makes application, they shall grant him a license authorizing him to discharge such duties on any such vessel for the term of five years; but such license shall be suspended or revoked upon satisfactory proof of bad conduct, intemperate habits, incapacity, inattention to his duties, or the willful violation of any provision of this title [R. S., 4399-4500] applicable to him. [See act June 9, 1910, p. 351.] (R. S., 4439; Dec. 21, 1898; sec. 2.) Mate's license.