Getting the right travel insurance cover is even more important if you have a pre-existing medical condition or you are looking for travel insurance over 65. specialises in providing travel insurance for pre-existing medical conditions and travel insurance over 65.nce you enter the dates of your trip and declare any pre-existing medical conditions you will be asked if you want to add any additional travel insurance cover. You can add winter sports cover at this point.
Elevation, or geometric height, is mainly used when referring to points on the Earth 's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and depth is used for points below the surface.
Angles of Elevation and Depression The angle of elevation of an object as seen by an observer is the angle between the horizontal and the line from the object to the observer's eye (the line of sight). If the object is below the level of the observer, then the angle between the horizontal and the observer's line of sight is called the angle of depression. From the top of a vertical cliff 40 m high, the angle of depression of an object that is level with the base of the cliff is 34Âº.