Unless otherwise authorized, no log, boom, float, pier, dock, fence, pile, anchorage, or other obstruction shall be installed or placed in small boat harbors without a permit from the department. No person shall operate any vessel in a manner which will unreasonably interfere with other vessels or free and proper navigation of waterways. Anchoring in heavily travelled channels or main thoroughfares shall constitute such interference.
Haw. Code R. § 13-231-42