indicator smoke
11Attack on Sydney Harbour — Infobox Military Conflict conflict=Attack on Sydney Harbour partof=the Battle for Australia during World War II caption=1 June 1942. A Japanese Ko hyoteki class midget submarine, believed to be Midget No. 14, is raised from Sydney Harbour date=31 …
12Air safety — is a term encompassing the theory, investigation and categorization of flight failures, and the prevention of such failures through regulation, education and training. It can also be applied in the context of campaigns that inform the public as… …
13Glossary of firefighting — Note: This list does not include firefighting equipment, i.e., tools and apparatus used by firefighters. Please refer to Glossary of firefighting equipment for such terms. : Note: This list is incomplete. You can help Wikipedia by… …
14environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
15Ordnance QF 18 pounder — Australian gun crew in action in the Ypres sector, 28 September 1917 Type Field gun Place& …
16T-54/T-55 operators and variants — Infobox Weapon name= T 54/55 caption= US Army recognition poster origin= Soviet Union type= Main battle tank is vehicle= yes is UK= yes service= 1947–present used by= wars= designer= Morozov (T 54), OKB 520 (T 54A and later) design date= 1945… …
17signal — I n. sign message 1) to flash, give, send a signal 2) a clear, unmistakable signal 3) a smoke signal (Indians used to send up smoke signals) 4) a turn signal (AE; BE has traffic indicator) 5) (AE) a traffic signal 6) a storm signal 7) a signal… …
18Flashover — For the 2007 documentary see Flashover (film).: In electric power transmission, a flashover is an unintended high voltage electric discharge over or around an insulator, or arcing or sparking between two or more adjacent conductors. A flashover… …
19Pathfinder (RAF) — For other meanings, see Pathfinder (disambiguation). No. 8 (pathfinder) Group Active 15 August 1942 (as Pathfinder Force) 1945 Country …
20Air pollution — from World War II production Smog over …
