ship's officer, officer - a person authorized to serve in a position of authority on a vessel; "he is the officer in charge of the ship's engines"

aircrewman - a member of an aircrew

astrogator - the navigator of a spacecraft

explorer, adventurer - someone who travels into little known regions (especially for some scientific purpose)

Vasco Nunez de Balboa, Balboa - Spanish explorer who discovered the Pacific Ocean (1475-1519)

Behring, Bering, Vitus Behring, Vitus Bering - Danish explorer who explored the northern Pacific Ocean for the Russians and discovered the Bering Strait (1681-1741)

Giovanni Cabato, John Cabot, Cabot - Italian explorer who led the English expedition in 1497 that discovered the mainland of North America and explored the coast from Nova Scotia to Newfoundland (ca. 1450-1498)

Cartier, Jacques Cartier - French explorer who explored the St. Lawrence river and laid claim to the region for France (1491-1557)

Christopher Columbus, Cristobal Colon, Cristoforo Colombo, Columbus - Italian navigator who discovered the New World in the service of Spain while looking for a route to China (1451-1506)

Captain Cook, Captain James Cook, James Cook, Cook - English navigator who claimed the east coast of Australia for Britain and discovered several Pacific islands (1728-1779)

da Gamma, Vasco da Gamma, Gamma - Portuguese navigator who led an expedition around the Cape of Good Hope in 1497; he sighted and named Natal on Christmas Day before crossing the Indian Ocean (1469-1524)

Davis, Davys, John Davis, John Davys - English navigator who explored the Arctic while searching for the Northwest Passage (1550-1605)

Bartholomeu Dias, Bartholomeu Diaz, Dias, Diaz - Portuguese explorer who in 1488 was the first European to get round the Cape of Good Hope (thus establishing a sea route from the Atlantic to Asia) (1450-1500)

Drake, Francis Drake, Sir Francis Drake - English explorer and admiral who was the first Englishman to circumnavigate the globe and who helped to defeat the Spanish Armada (1540-1596)

Frobisher, Sir Martin Frobisher - English explorer who led an expedition in search of the Northwest Passage to the orient; served under Drake and helped defeat the Spanish Armada (1535-1594)

Humphrey Gilbert, Sir Humphrey Gilbert, Gilbert - English navigator who in 1583 established in Newfoundland the first English colony in North America (1539-1583)

Robert Gray, Gray - American navigator who twice circumnavigated the globe and who discovered the Columbia River (1755-1806)

Henry Hudson, Hudson - English navigator who discovered the Hudson River; in 1610 he attempted to winter in Hudson Bay but his crew mutinied and set him adrift to die (1565-1611)

Ferdinand Magellan, Fernao Magalhaes, Magellan - Portuguese navigator in the service of Spain; he commanded an expedition that was the first to circumnavigate the world (1480-1521)

Abel Janszoon Tasman, Abel Tasman, Tasman - Dutch navigator who was the first European to discover Tasmania and New Zealand (1603-1659)

George Vancouver, Vancouver - English navigator remembered for his exploration of the Pacific coast of North America (1757-1798)

Giovanni da Verrazano, Giovanni da Verrazzano, Verrazano, Verrazzano - Florentine navigator who explored the eastern coast of North America (circa 1485-1528)

Americus Vespucius, Amerigo Vespucci, Vespucci - Florentine navigator who explored the coast of South America; America was named in his honor (1454-1512)