The
23rd TASS Tactics Board regularly looked for weaknesses in the network of roads
that snaked through
The FACs wanted to create temporary chokepoints that were not ringed with AAA like the regular interdiction points. Trucks delayed near those points could be attacked more. Once the enemy brought in more AAA/AW, the FACs planned to abandon each new point and concentrate the airstrikes elsewhere.
This plan was similar to successful attacks along Route 911 in early 1966. The new plan included the additional objective of forcing more trucks onto the longer, less defended Route 23.
The 1967 plan called for day strikes against a chosen road segment. FACs would stay overhead throughout the day to prevent repairs. Lamplighter, the C-130 flare aircraft, would replace the O-1s at dusk. The 24-hour coverage over the damaged road would keep the road closed indefinitely.
The Nails also knew exactly where the first bombs of the operation should fall. Just below the Chokes, all bypasses necked down to a single road. Every southbound truck on Routes 911 and 912 used that one mile section of road.
If the fliers could close that short piece of road, every truck driver would have to divert to Route 23. Trucks that reached the Chokes on Route 912 would have to turn north on 911 instead of south. These trucks would have to detour 120 miles to cover the 30 miles separating the Chokes and the transshipment center at Tchepone.
The North Vietnamese had one other option. Drive the trucks as close as possible to the new choke point. Then, using pack animals, cargo bicycles, and plain manpower, carry the cargo to trucks south of the damaged road.
Shuttling
the cargo was the more likely reaction. The
North Vietnamese had no desire to expose all their trucks to 90 more miles of
the gauntlet in central
Yet, clusters of their trucks above and below the new choke point would make lucrative targets for night armed reconnaissance missions and daylight strikes against truck parks just north of the point.
With
some "pride of authorship," the Nails suggested that the single point
interdiction program be called the "Nailhole."
Seventh Air Force scheduled the Nailhole plan to start on
Seventh
Air Force Operation Plan 483-67 started the single point interdiction plan on
Someone at Seventh Air Force renamed this spot the "HUB." The Nails preferred the original name, but the HUB was a descriptive title. The accompanying picture shows that the roads above and below the point spread out like spokes of a wheel from a hub.