The Tower's Eye: Why Air Traffic Control Tower Siting Is Master-Planning Work

By Nathaniel Pyron

The first time I sat in an air boss's chair, I was twenty years old, on the island of the USS Kitty Hawk. It was not my job to sit there — I was a sailor, not a controller — but the view stuck with me for thirty years. From that seat, the entire flight deck laid itself out like a diagram: launch, recovery, the foul lines, the island's own blind spots. Whoever designed that perch understood something that too many base master planners forget: the control tower is not a building you place after the airfield is done. It is the eye the whole airfield is organized around.

I have watched master plans treat the tower as an afterthought — a facility requirement with a square footage and a MILCON line item, dropped onto whatever parcel is left over. That is backwards. Siting a tower is one of the most geometrically demanding land-use decisions on any airfield, and getting it wrong is a mistake you cannot easily move. Concrete cures. Sightlines do not negotiate.

The tower is a land-use decision, not just a facility

When the Navy opened a new control tower at Webster Outlying Field this past February — ribbon cutting on February 9, 2026 — the project team talked about visibility first: better sightlines, a modern cab, an environment where controllers could see everything they were responsible for. At Vandenberg Space Force Base, the Air Force is designing a consolidated control tower and fire station for construction starting in fiscal 2028. Robins Air Force Base has a $28 million replacement tower programmed in the FY2026 military construction budget. These are not facelifts. Each one is a siting problem: where on a working airfield can you put a tall structure that must see everything and obstruct nothing?

The Federal Aviation Administration's tower siting process puts the visual requirement first for a reason. From the controller's eye level in the cab, there must be an unobstructed view of every controlled movement area — all runways, all taxiways, all aprons — plus the traffic in the vicinity of the airport. That is not a suggestion. It is verified with modeling tools, shadow studies showing that no part of any movement area falls into the tower's own shadow, and 360-degree panoramic photography taken at the proposed eye height. If a hangar, a parking structure, or a stand of trees blocks the view, the site fails.

Nathaniel Pyron has learned that this makes the tower one of the few buildings on a base whose footprint is effectively the entire airfield. The tower does not occupy a parcel; it occupies a viewshed.

The geometry of seeing

Think about what that viewshed analysis actually constrains. The cab height has to be tall enough to see over everything between the tower and the farthest runway end — but low enough not to penetrate approach surfaces or transitional surfaces, not to conflict with terminal instrument procedures, and not to create an obstruction that requires its own airspace review. On a military airfield with long runways and wide safety areas, that sweet spot is narrow. And the taller the tower, the bigger its own footprint on the imaginary surfaces that protect flight paths.

Then there is the ground. The tower needs clear, unshadowed sightlines down to the movement areas, which means the site has to be positioned so the sun does not blind the controllers at critical hours. Sunrise and sunset glare, low winter sun angles, reflections off wet pavement and parked aircraft canopies — all of these get evaluated. I remember flight-deck crews talking about exactly this problem on the ship: the island's shadow sweeping the deck in the late afternoon. On shore, a planner gets to choose where the tower goes. That is the whole advantage of doing it on paper first.

There are also the neighbors the tower brings with it. A modern tower is not just a cab on a shaft. It houses radar and communications equipment, backup power, training and simulator rooms, and the approach-control or radar approach facilities that sit beside or below the cab. Each of those has its own electromagnetic and physical siting constraints — antennas that cannot be blocked, radar that cannot be shadowed, systems that cannot be jammed by the metal of an adjacent building. The Air Force's tower program treats the whole package as one facility establishment decision, with standard designs and a requirements document signed at the director level. The master planner's job is to hold a reservation on the map big enough to contain all of it, including the clear zones around it.

Why planners, not just engineers, own this

Tower siting sits at the exact intersection where I have spent my career: the place where operational geometry meets land-use law. An engineer can tell you whether a candidate site meets the visibility criteria. Only a planner can tell you whether that site will still be available — and still be the right site — ten years from now, when the apron has been expanded, the new hangar row is built, and the solar array the energy office wants would sit right in the controller's sightline to the approach end of the runway.

That is the part that gets skipped. I have seen plans where the tower is sited to today's geometry, with no reserved envelope for the airfield the base is actually building toward. Then the apron expansion goes in, the viewshed analysis that justified the original tower no longer describes reality, and the base is left with a choice between constraining its own growth and constraining its controllers. Neither is acceptable. The master plan should draw the tower's viewshed the way it draws explosive safety arcs or noise contours: as a constraint surface that future development must respect, updated every time the airfield layout changes.

The Army's own tower policy makes the connection explicit. An ATC tower at an Army airfield is justified by traffic volume — 20,000 or more annual movements, or a mix of aircraft types and mission requirements that make tower control a safety necessity. The justification is operational; the consequence is spatial. Approving the tower means reserving the sightlines forever.

The Pacific angle

On Pacific airfields, tower siting carries an extra weight that stateside planners rarely feel. Space is the scarcest resource. Many of these airfields sit on narrow coastal plains or compact islands where every acre of developable land is already claimed by something — housing, fuel, munitions, the flight line itself. A tower that needs a clear 360-degree viewshed is competing with all of them, and on an island there is no “other side of the base” to move to. The master planner has to negotiate the tower's reservation early, before the fuel farm or the housing area locks in a site that will shadow the cab for the next fifty years.

There is also the distributed-posture reality. As operations spread across more fields and auxiliary airfields, more of them need tower services — or at least the reserved geometry for a tower that might come later. The mobile towers the military deploys, like the MSN-7 that supported operations at Joint Base McGuire-Dix-Lakehurst last year during a tower refurbishment, are a reminder that the tower function can move. But the permanent tower cannot, and the siting decision should be made with the assumption that the mission will grow into it.

The planner's five moves

If you are working a military airfield master plan and the tower is on the horizon — or should be — here is how I would handle it:

1. Draw the viewshed as a constraint surface. Run the line-of-sight and shadow analysis for the tower site the same way you would run an AICUZ noise contour or an explosive safety arc. Put it on the constraints map. Make future development prove it does not degrade the controller's view.
2. Site to the future airfield, not the current one. Verify the tower's sightlines against the ultimate build-out layout — the expanded apron, the new runway if one is programmed, the hangar row that is still just a concept. A tower sited to today's geometry is a tower with an expiration date.
3. Coordinate the sun. Evaluate glare and shadowing at the tower's actual latitude across seasons, not just at noon on a clear day. The Pacific sun at low angle is a different problem than a continental winter sun, and controllers work both.
4. Protect the electromagnetic envelope. Reserve clear space around the tower's antennas, radar, and communications gear. A building that is fine for the viewshed can still be fatal to the systems the tower depends on.
5. Budget the tower as a MILCON land decision, not just a construction cost. The Robins tower is programmed at $28 million. That is the price of the building. The price of the wrong site is measured in constrained operations for decades. The master plan is where that trade gets made — or missed.

The eye comes first

I think about that chair on the Kitty Hawk more often than people would guess. The Navy spent a fortune on steel and propulsion to put that ship where it needed to be, and then it put the most important seat on the island where one person could see everything. Airfields ashore are the same. The tower is the eye of the operation, and the master plan is the document that decides what that eye will be able to see for the next half century.

Nathaniel Pyron believes the best tower siting decisions are made before the first concrete is poured — on paper, in the master plan, where moving a building costs nothing. Get the eye right, and everything the tower watches over has room to grow.

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).