A professional who compiles reports and calculates tariff assessments for services rendered vessels using harbor facilities. Responsibilities include:

• Reads register of merchant vessels to verify tonnage, registry, and ship's owner.
• Calculates charges and types tariff form for service furnished, such as gallons of water and kilowatts of electricity used during vessel's stay in harbor.
• Keeps records of ships entering port and tonnage of cargo unloaded or loaded.
• Submits reports to accounting and traffic departments for billing purposes.