Misc: Hovercrafts can be described as A.C.V.s. For what do the letters A.C.V. stand?

Questions

Soyuz 26 carries 2 cosmonauts to Salyut 6 space station.?

Soyuz T-5 returns to Earth, 211 days after take-off.?

South African Bishop Desmond Tutu received his Nobel Peace Prize.?

(US) Gugliemo Marconi sends the first wireless message across the Atlantic.?

(Ireland) Martial Law Declared.?