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23 February 2013, 19:05
I agree you need people you can rely on but I don't agree that even with the best will in the world and the best perimiter security, you can gaurantee 100% that an intruder will not get away to return later.
How big is your BOL? Lets say you have an area 100 feet across. Thats an immediate perimeter of over a hundred yards. Suppose you dig a moat / spear pit 3 feet wide and the same deep. At a conservative 1 ton per cubic yard thats over 100 tons of soil to shift!
Trip wires would cover the distance but then you either need a lot of closely set devices or a few devices and more wire.
Its 3am and you are asleep after a busy day setting your trip wires. Baddie wanders into one of your trip wires and there is a loud noise. He immediately turns and runs like hell. You wake, gather your wits and a wepeon and then head in the direction of the alarm. Takes maybe one minute maybe two. A fit baddie could be over a quarter of a mile away in that time and the chances of finding him are very limited. Considder that against having 3 men on stag with the same trip alarms and spaced 35 yards apart. The max distance for a sentry to engage baddie is now 17.5 yards. The chances of baddie escaping are now very limited. Just need some reliable sentries.
How big is your BOL? Lets say you have an area 100 feet across. Thats an immediate perimeter of over a hundred yards. Suppose you dig a moat / spear pit 3 feet wide and the same deep. At a conservative 1 ton per cubic yard thats over 100 tons of soil to shift!
Trip wires would cover the distance but then you either need a lot of closely set devices or a few devices and more wire.
Its 3am and you are asleep after a busy day setting your trip wires. Baddie wanders into one of your trip wires and there is a loud noise. He immediately turns and runs like hell. You wake, gather your wits and a wepeon and then head in the direction of the alarm. Takes maybe one minute maybe two. A fit baddie could be over a quarter of a mile away in that time and the chances of finding him are very limited. Considder that against having 3 men on stag with the same trip alarms and spaced 35 yards apart. The max distance for a sentry to engage baddie is now 17.5 yards. The chances of baddie escaping are now very limited. Just need some reliable sentries.