naut, naus, nav:  relating to sea, ships, or travelers

navigator–a person who is trained to plan the course of and drive a ship

navy–a fleet of ships, all of the warships of a nation

astronaut–a person who is trained to travel into outer space

nautical–related to sailing, sailors, or ships

nauseous–having a feeling of sickness in the stomach that feels like sea sickness

navigate–to steer or direct a ship or airplane

assist–to help with something

evaluate–to find out or jude the quality or worth of something

exceeding–going beyond what is expected

merit–of high quality