Nathaniel Pyron on Air Traffic Control Tower Siting: Planning the View From the Top

Nate at age 20 in the Air Boss chair aboard USS Kitty Hawk (CV-63) — controlling air traffic is a line-of-sight job, whether the view is a flight deck or a runway.

The air traffic control tower is the one building on an airfield whose entire job is seeing. Everything else on the field — the hangars, the terminals, the maintenance shops — can function with walls between it and the runway. The tower cannot. A controller who cannot see a runway end, a taxiway intersection, or an aircraft holding short cannot control the airfield, and no amount of radar or camera technology changes the rule that the visual picture is primary. Tower siting is therefore one of the purest exercises in installation planning: the building exists to see, so its location must be chosen for seeing first and everything else second.

Line of sight is the governing requirement, and it is unforgiving. From the cab, controllers need an unobstructed view of all movement areas under their jurisdiction — every runway threshold, every taxiway the tower controls, the aprons where aircraft push back and taxi. The geometry is three-dimensional: as buildings go up and pavements extend outward, the sight lines from a fixed cab height get progressively blocked. A tower that saw everything in 1995 can be blind to the new taxiway in 2025, and the installation that allowed an unplanned hangar to rise between the cab and the field edge has created a problem no procedure can fix. Nathaniel Pyron's rule of thumb: plan the tower's sight lines the way you plan an easement — nothing gets built inside them, ever.

Height is the second variable, and it works against the first. Taller towers see over more of the field, but every foot of tower height is structure, cost, and — critically — an obstruction the tower itself introduces into the airfield's imaginary surfaces. The tower must be evaluated against the same obstruction criteria it exists to protect, and a tower that penetrates a controlling surface trades one problem for another. The planner's job is to find the minimum height that preserves the sight lines, not the maximum height the budget allows. Airfield design criteria for towers exist precisely to discipline this tradeoff, and the installation development plan is where the tradeoff gets documented.

Orientation matters more than most people expect. The cab's glass orientation determines glare at sunrise and sunset, and a controller staring into the sun at the morning push is a controller working degraded. Planners coordinate cab orientation with the runway headings and the sun angles for the airfield's latitude — a quiet detail that separates a tower that works from a tower that merely exists. The equipment room, the break areas, and the administrative space all sit below the cab, but their arrangement drives the tower's footprint, and the footprint drives where on the airfield the tower can actually fit without creating its own obstruction problems.

Adjacency is the third requirement. The tower does not operate alone: controllers coordinate constantly with airfield management, weather, and base operations, and the tower facility typically sits near the airfield operations complex for a reason. The planner sites the tower within the airfield operations district, on ground that leaves room for future cab-height growth, with access roads that do not cross active taxiways and utilities sized for the facility's redundant power and communications. A well-sited tower is a node in an operations campus, not a monument standing alone on the field.

Relocation is the scenario the plan exists to prevent. Moving an operating tower is one of the most painful projects an installation can undertake: the new tower must be fully commissioned — equipment, communications, sight lines verified — before the old one can be decommissioned, and the old tower often cannot simply be demolished because it penetrates the surfaces the new one was built to protect. Nathaniel Pyron's guidance: the cheapest tower project is the one you never have to do, and that means the installation development plan reserves the tower's sight corridors and future expansion room on day one. The plan protects the tower's view decades before the tower needs it.

The facility's BFR documents the space program and the cost that justifies it — the analytical discipline behind the building, not just its geometry. And when a tower does need replacing, the new site goes into the plan long before the old tower degrades, so the commissioning sequence never has to be rushed under an operations emergency.

A control tower is the airfield's eyes. Siting it is the planner's promise that those eyes will still see clearly fifty years from now — not because anyone predicted the future, but because the plan protected the view.

About the author

Nathaniel Pyron is a military urban planner specializing in military master planning with an airport/airfield focus. A U.S. Navy veteran who served in 1995, he later spent three years as a civilian community planner working with the U.S. Marine Corps at Camp Blaz and Darwin, Australia. He studied at the Arizona State University School of Urban Planning, class of 2007, and is an active LEED AP BD+C. Based in Honolulu, Hawaii, he writes about installation planning, airfield land use, and where military readiness meets community design. His LinkedIn title is Urban Planner (Land Use & Airspace).