hardened shelter

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blast pen

blast pen
Open blast pen.
blast pen
A covered blast pen.
Small enclosures surrounded by a strong embankment on two or three sides but open from the front (and in some cases also from the rear to cater for jet efflux or to permit entry of aircraft) to admit and store aircraft. Blast pens are also designed for storing or parking missiles, specialist vehicles, etc. Also called a hardened shelter.


An area protected on three sides by sandbags, concrete, compacted earth, or other material. The aim is to provide blast protection to the aircraft, weapon system, or essential equipment inside and beyond the revetment. Also called a blast fence, open blast pen, or hardened shelter.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
"The central government has cleared a project for the construction of around 110 hardened shelters also known as blast pens which protect the fighter planes from enemy missile or bomb attacks," government sources told ANI.
These hardened shelters are made up of very thick concrete walls which can withstand heavy attacks from the enemy.
Summary: New Delhi [India], Jan 14 (ANI): The government has asked the Central Public Works Department (CPWD) to build 44 strategic roads in the five states along the China border with 96 hardened shelters for the Indo-Tibetan Border Police (ITBP) troops there.