primary surface

primary surface

A rectangular surface longitudinally centered about a runway. Its width is a variable dimension, and it usually extends 200 ft (60 m) beyond each end of the runway when the runway has a specially prepared hard surface. When the runway has no specially prepared or planned hard surface, the primary surface ends at each end of that runway. The elevation of any point on this surface coincides with the elevation of the nearest point on the runway centerline or the extended runway centerline.
References in periodicals archive ?
Contract notice: Supply and installation of mlat, And advanced a-smgcs, Incorporating primary surface radar (smr), At athens international airport (dia).
The surface activation stage was devided into two steps primary and secondary, The primary surface activation treatment involved chemical surface treatments (acid and alkali etching) in order to precipitate some elemnts to make more effective surface.
Tables 1-4 further show the comparison of two primary surface roughness parameters, Ra and Rmax, between the MLP and RBF models.
WALLPAPER--NOT JUST FOR YOUR SCREEN SAVER Wallpaper is a wonderful way to add color, texture and fiber to your paintings, collages, and drawings, or use as your primary surface. Free wallpaper books are usually available at your local hardware or design stores when the new season begins.
Mining is designated as the primary surface land use in the region.
It is the UK's definitive estuarine raised mire: despite extensive drainage reclamation and peat cutting in the past, it retains the largest expanse of primary surface lowland raised bog in Britain.
SDDC is a unique Army command responsible for commercial surface lift and is the primary surface distribution manager for USTRANSCOM.
In some airplanes, moving what you think is a primary control actually changes a secondary control surface's position, which then moves the primary surface. Let's explore.
For purposes of calculating evaporator performance, primary surface is considered to be 100% effective in its contribution to the total heat transfer surface area while secondary surface has a surface effectiveness less than 100% due to the change in surface temperature from the root to the tip of the fin.
The two primary surface routes for supplying US Forces in Afghanistan will be through Pakistan and across the northern route into Afghanistan.
The primary surface quality and colour were achieved by coating the vessel with a carefully prepared slip, probably of iron-rich clay.
841st is the primary surface deployment and distribution provider to the XVIII Corps, 82nd Airborne Division, II Marine Expeditionary Force, 3rd Infantry Division and 10th Mountain Division.