sparse network of air, ocean, river, and land routes; the Northwest Passage (North America) and Northern Sea Route (Eurasia) are important seasonal waterways
Kiel Canal and Saint Lawrence Seaway are two important waterways; significant domestic commercial and recreational use of Intracoastal Waterway on central and south Atlantic seaboard and Gulf of Mexico coast of US
aids to navigation - lighthouses: Europa Island 18m; Juan de Nova Island (W side) 37m; Tromelin Island (NW point) 11m (all in the Iles Eparses district)
