Coxswains manoeuvre and navigate small vessels, consult weather authorities before planning a voyage, give instructions to the crew, communicate with passengers, update vessel logbooks, assist with mooring and unmooring vessels. monitor condition and seaworthiness of vessels, transmit and receive information by marine radio or telephone, respond to emergency situations, use navigational information and techniques to conduct a safe passage, service propulsion systems, low-voltage electrical systems and auxiliary systems, operate pumping systems, and outboard and inboard diesel engines.