Strip anatomy and types

A strip does not keep one fixed shape. Flight Strips chooses a presentation that fits the flight’s bay and the controller layout. The underlying flight remains the same; the displayed boxes change so the information needed for the current stage is visible.

Box names

Not every strip type contains every box. These are the names used throughout the documentation:

Box	What it displays
SI	Your position’s ownership relationship to the strip and any pending handoff. See Ownership and handoffs.
Callsign	The aircraft callsign. On operational strips, the next frequency or position can appear beneath it prefixed by :.
A/C type	Aircraft type and, where shown, wake-turbulence category.
Registration	Aircraft registration, shown below the aircraft type on apron strips.
Destination	Destination aerodrome.
Stand	Assigned or expected parking stand.
Squawk	Assigned transponder code.
Runway	Assigned arrival or departure runway.
TWY	Taxiway or taxi clearance limit.
HP	Holding point.
SID	Standard instrument departure.
Cleared FL	Cleared altitude or flight level.
Heading	Assigned heading.
EOBT	Estimated off-block time.
TOBT	Target off-block time.
TSAT	Target start-up approval time.
CTOT	Calculated take-off time. The box is blank when the flight has no CTOT to display.
QNH	Current pressure setting decoded from the airport METAR.
POB	Persons on board.
Status	GROUND or AIRBORNE on a control-zone strip.
Language	Pilot language recorded on a control-zone flight plan.
FPL type	Flight-plan type recorded for a control-zone flight.

Some boxes are intentionally blank. Where described below, a blank box is still clickable and opens the flight plan.

Departure strip types

Before clearance

The pre-clearance strip is used for flights that have not moved to CLEARED. It has no SI box because it is a clearance-delivery work item rather than an owned operational strip.

Left to right:

Callsign	Destination / Stand	EOBT / CTOT	TOBT / TSAT

The destination and stand share one box. EOBT and CTOT share another; TOBT and TSAT share the last.

Cleared summary

The cleared summary shown on the clearance layout adds ownership while retaining the time-focused clearance view.

Left to right:

SI	Callsign	Destination / Stand	EOBT / CTOT	TOBT / TSAT

Compact clearance strip

When another layout shows clearance traffic in a narrow bay, Flight Strips uses this compact form:

OB	Callsign	A/C type	Runway	SID	Stand

OB is the identifier displayed in the first box of this strip type. It is not the ownership SI box.

Start-up, pushback and de-ice

The same presentation is used in the implemented STARTUP, PUSHBACK and DE-ICE bays.

SI	Callsign / next frequency	A/C type / Registration	Stand or release point	TSAT / CTOT	Runway

The stand box displays the release point instead of the stand once a release point exists.

Apron departure taxi

Apron controller layouts use this departure-taxi presentation:

SI	Callsign / next frequency	A/C type / Registration	Stand / CTOT	TWY / HP	Runway

The TWY/HP box changes its emphasis depending on whether the stored release point is a taxiway or holding point.

Tower and ground departure taxi

Tower and ground layouts use the more detailed departure strip for departure traffic in TWY-DEP, RWY-DEP and AIRBORNE:

| SI | Callsign / next frequency | A/C type / Squawk | Stand | TWY | Runway / HP | Cleared FL / Heading | SID / Destination / CTOT | | --- | --- | --- | --- | --- | --- | --- | --- | --- |

The last box stacks SID, destination and CTOT. A red cleared-flight-level box indicates that the requested altitude violates an active ECFMP prohibited-level restriction. A red destination section indicates an active ECFMP ground-stop restriction.

Arrival strip types

Final, runway and taxi arrival

The tower and ground layouts use one arrival presentation in FINAL, RWY-ARR and TWY-ARR:

SI	Callsign / next frequency	A/C type / Squawk	Stand	Runway / HP or TWY	Flight plan

The final flight-plan box is intentionally blank. Click it to open the flight plan. The runway box controls runway-clearance or confirmation actions only while the strip is in FINAL or RWY-ARR and owned by your position.

Apron arrival

Apron layouts use a registration-focused arrival strip:

SI	Callsign / next frequency	A/C type / Registration	Runway	TWY	Stand

Compact arrival and pushback strips

Compact strips are used where a full strip is not required. The left identifier distinguishes their purpose:

Identifier	Callsign	A/C type	Runway	TWY	HP	Stand

The implemented controller layouts currently show OB for compact pushback traffic and LA for locked arrival traffic. A locked arrival strip is read-only.

Control-zone strip

The control-zone strip is a separate VFR-oriented presentation:

Indicator	Callsign / Remarks	Squawk	QNH / POB	Status / Language / FPL type	Flight plan

The first box is a fixed white indicator in the current implementation, not the normal ownership SI. The last box is intentionally blank and opens the flight plan.

At EKCH, the displayed status changes from GROUND to AIRBORNE when the reported altitude is more than 200 feet above the configured field elevation of 17 feet. If the altitude is unavailable—or the airport is not EKCH—the displayed status is GROUND.

Non-flight strips

Tactical strips

Flight Strips also renders tactical items that are not flight plans:

• Memory aid: blue, with its label and optional aircraft reference. It includes a confirmation cell when another controller needs to acknowledge it.
• Crossing: yellow, with its label and optional aircraft reference.
• START and LAND: orange runway-action reminders with their type, label and optional aircraft reference.

When you own a tactical strip, it has a white ownership cell on the left and a delete box on the right. Clicking the body marks or unmarks it. A controller who does not own it can open its ownership menu and use FORCE ASSUME.

Message strips

A message strip contains three boxes:

Sender indicator	Message text	Dismiss

The sender indicator represents a system, broadcast or personal message. The X box dismisses the message from the board.