Sh-2f "alarm"
"Siren" is an all-weather multi-purpose ship-borne helicopter developed by Kaman Company for the US Navy. It can be used to perform search and rescue, observation and general tasks. Now it mainly supports the US fleet to carry out anti-submarine and anti-ship defense missions in the Mediterranean, Atlantic and Pacific.
CH-54 Tahe
CH-54 is a twin-engine single-propeller lift helicopter developed by Sikorsky Company of the United States. The company number is S-64, and the nickname is "aerial crane". The U.S. military is numbered CH-54 and nicknamed "Tahe". S-64 was developed on the basis of S-60 testing machine. S-56 rotor was adopted, and the power and device were modified twice by Platts. As of June 1974, except for civilian use, * * * has produced 96 aircraft for the US Army.