rough-water trials
31de Havilland Comet — This article is about the jet airliner. For the 1930s racing aircraft, see de Havilland DH.88. DH 106 Comet …
32Salem, Massachusetts —   City   Salem Maritime National Historic Site …
33German battleship Tirpitz — A recognition drawing of Tirpitz prepared by the US Navy …
34Off-roading — A Land Rover Defender 90 off roading Off roading is a term for driving a vehicle on unsurfaced roads or tracks, made of materials such as sand, gravel, riverbeds, mud, snow, rocks, and other natural terrain. Contents 1 …
35medicine, history of — Introduction the development of the prevention and treatment of disease from prehistoric and ancient times to the 20th century. Medicine and surgery before 1800 Primitive (primitive culture) medicine and folklore Unwritten history is not… …
36Billings, Montana — Billings redirects here. For other uses, see Billings (disambiguation). Billings, Montana   City   Billings skyline with the Beartooth Mountains in …
37Steam locomotive — A steam locomotive is a locomotive powered by steam. The term usually refers to its use on railways, but can also refer to a road locomotive such as a traction engine or steamroller.Steam locomotives dominated rail traction from the mid 19th… …
38Dornier Do 217 — Do 217 Do 217 E 2 Role Medium bomber Heavy bomber …
39Anti-frogman techniques — are security methods developed to protect watercraft, ports and installations, and other sensitive resources both in or nearby vulnerable waterways from potential threats or intrusions by frogmen or other divers.Risks and threats to be defended… …
40Tanks in World War I — The development of Tanks in World War I began as a solution to the stalemate which trench warfare had brought to the western front. The first prototype of the Mark I tank was tested for the British Army on 8 September 1915. Although initially… …
