“Butterfly”sea cucumber

150 ton Sea Surveillance Ship

1982 United Nations Convention on the Law of the Sea

1D improved fractal sea surface model

2D improved fractal sea surface model

a modern sea battle

a sea battle

a western south China sea gas field

abeam replenishment at sea

above mean sea level

above sea level

above sea level {= ASL}

Abrupt Changes of Sea Ice

abysmal sea

abyssal sea

access to territorial sea

Access to the sea

accident at sea

accidents at sea

accidents of the sea