SHIP PROPULSION DEVICE, COMMUNICATION TERMINAL, AND KEY CODE SEVER
WORD REGISTRATION METHOD AND WORD REGISTRATION DEVICE
DRAWING MANAGEMENT SYSTEM, AND METHOD AND PROGRAM FOR CONTROLLING DRAWING MANAGEMENT SYSTEM
WAKE FLOW FIELD DESIGN METHOD, WAKE FLOW FIELD DESIGN SYSTEM, AND SHIP CONSIDERING WAKE FLOW FIELD
WATERBORNE MOBILITY SYSTEM, BATTERY-POWERED BOAT, MANAGEMENT DEVICE, AND PORT