An anchorage is a location at sea where ships can lower anchors.
Anchorages are where anchors are lowered and utilised, whereas moorings usually are tethering to buoys or something similar. The locations usually have conditions for safe anchorage in protection from weather conditions, and other hazards.
The purpose of resting a ship at sea securely can be for waiting to enter ports, as well as taking on cargo or passengers where insufficient port facilities exist.
Some coastlines without port facilities have extensive anchorage locations.
In the days of large-scale sailing ship operation, anchorages were locations where ships could wait for wind changes to be able to continue journeys.
The mooring of large ships in locations with adequate conditions for secure berthing is an engineering task requiring considerable technical skill. 
- ^ Conference on Mooring Large Ships over 150,000 dwt (1979 : London, England); Institute of Marine Engineers (1980), Conference on Mooring Large Ships over 150,000 dwt : Wednesday, 5 December 1979, Marine Management (Holdings) for the Institute of Marine Engineers, ISBN 978-0-900976-87-2
- ^ NATO Advanced Study Institute on Advances in Berthing and Mooring of Ships and Offshore Structures (1987 : Trondheim, Norway); Bratteland, Eivind; North Atlantic Treaty Organization. Scientific Affairs Division (1988), Advances in berthing and mooring of ships and offshore structures, Kluwer Academic Publishers, ISBN 978-90-247-3731-4
||Look up anchorage in Wiktionary, the free dictionary.