A professional who compiles data and prepares certificates of admeasurement to document ships, and determine type of license and safety equipment required, net tonnage, and applicable tolls and wharfage fees. Responsibilities include:

• Examines blueprints of ship and takes physical measurements to determine capacity, using rule and tape measure.
• Computes gross and net tonnage and deductible space of vessel required by laws.
• Prepares sketches of vessels, using drafting instruments.
• Writes certificates of admeasurement, listing such details as design, length, depth, and breadth of vessel, and method of propulsion.