This is a list of seas of the World Ocean, including marginal seas, areas of water, various gulfs, bights, bays, and straits. [2] . In many cases it is a matter of tradition for a body of water to be named a sea or a bay, etc., therefore all these types are listed here.

Sea area A1 is that sea area which is within a circle of radius A nautical miles over which the radio propagation path lies substantially over water. The radius A is equal to the transmission distance between a ship's VHF antenna at a height of 4 m above sea level and the antenna of the VHF coast station which lies at the centre of the circle.

2024年12月13日 · The Area is comprised of the seabed and subsoil beyond the limits of national jurisdiction. It does not include superjacent waters (i.e., the water column) or the air space above those waters. The Area and its resources are the common heritage of mankind, and no State may claim or exercise sovereignty or sovereign rights over any part of the ...

2024年2月17日 · The area outside that covered by areas A1, A2 and A3 is called Sea Area A4 Area. Ships traveling these regions must carry a DSC-equipped HF radiotelephone, in addition to equipment required for areas A1 and A2.

The Coast Guard defines Sea Area A1 as those areas where more than ninety percent of the area within 20 nautical miles seaward of the territorial baseline along the East, West and Gulf Coasts of the United States, excluding Alaska, and including Hawaii, Puerto Rico, Guam, the Virgin Islands of the United States and the Northern Mariana Islands ...

GMDSS divides the world’s oceans into four “sea areas”, designated A1 through A4. An area within the radiotelephone coverage of at least one VHF coast station in continuous digital selective calling (DSC), alerting is available. Area could extend up to 30-50 Nautical Miles.

A sea is a large body of salt water. There are particular seas and the sea. The sea commonly refers to the ocean, the interconnected body of seawaters that spans most of Earth. Particular seas are either marginal seas, second-order sections of the oceanic sea (e.g. the Mediterranean Sea), or certain large, nearly landlocked bodies of water.

GMDSS的基本概念是岸上的搜寻当局以及遇险船舶和遇险人员附近的其他船舶，能迅速接收到遇险事件的报警，并毫不延迟地进行协调搜救援助。 GMDSS还提供紧急和安全通信并播发海上安全信息（航行警告和气象警告、 气象预报 及其他紧急安全信息）。 换言之，无论船舶航行在哪个海区，都能够完成对本船和航行在同一海区的其他船舶的安全具有重要意义的通信功能。 为此，参加关于GMDSS无线电通信1988年《国际海上人命安全公约》（SOLAS）修正案的各缔约国政 …

The terms "the ocean" or "the sea" used without specification refer to the interconnected body of salt water covering the majority of Earth's surface. [10] [11] It includes the Pacific, Atlantic, Indian, Southern/Antarctic, and Arctic oceans. [19] As a general term, "the ocean" and "the sea" are often interchangeable. [20]

必应词典为您提供sea area的释义，n. 海区； 网络释义： 海域；舟山海域；海区海域面积；