N.H. Rev. Stat. Ann. § 12-G:47

The authority, in consultation with the executive director, the division director, and the division of ports and harbors advisory council, may adopt rules prescribing the qualifications of pilots, and from time to time appoint and commission, under its hand and seal, as many pilots as it may judge necessary, and remove the same at pleasure; and it shall take from them such security, by bond or otherwise, as it may deem proper.