Tropical cyclone scales barometric pressure is low compared with its surroundings. Other classifications historically used include: cyclonic storm where the winds did not exceed force 10 on the Beaufort scale and a Cyclone where the winds are either force 11 and 12 on the Beaufort scale. Between 1924 and 1988, tropical cyclones were classified into four categories: depression, deep depression, cyclonic storms and severe cyclonic storms. However, a change was made during 1988 to introduce the category "severe cyclonic storm with core of hurricane winds" for tropical cyclones, with wind speeds of more than . During 1999 the categories Very Severe Cyclonic Storm
USS Beaufort (ATS-2) towing to Ream, Cambodia. Beaufort departed Naha on August first and shaped a course for Ream, however Beaufort encountered a storm and all three barges broke their tow lines so Beaufort Gunnersmates sank all three barges so they were not floating around the open ocean. While in Ream Beaufort came under attack from the jungle. Gunnersmates Day, Kelley Reed, and Seabo returned fire with the 50 caliber machine guns. At the time there was a disabled Cambodian ship so the Captain of the Beaufort directed the Captain of the Cambodian ship, and a minor argument ensued the Captain of the