---
title: "SPO.OP.145 Take-off alternate aerodromes — complex motorpowered aeroplanes — Part-SPO · Avioverse"
description: "For IFR flights, the pilot-in-command shall specify at least one weather-permissible take-off alternate aerodrome in the flight plan if the…"
url: "https://avioverse.aero/regulations/easa/air-ops/part-spo/subpart-b/spo-op-145"
---

# SPO.OP.145 Take-off alternate aerodromes — complex motorpowered aeroplanes

ANNEX VIII (Part-SPO) · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026

IR Implementing rule

## SPO.OP.145 Take-off alternate aerodromes — complex motorpowered aeroplanes

(a) For IFR flights, the pilot-in-command shall specify at least one weather-permissible [take-off alternate aerodrome](https://avioverse.aero/glossary/easa/take-off-alternate-aerodrome) in the flight plan if the meteorological conditions at the aerodrome of departure are at or below the applicable [aerodrome operating minima](https://avioverse.aero/glossary/easa/aerodrome-operating-minima) or if it would not be possible to return to the aerodrome of departure for other reasons.

(b) The take-off alternate aerodrome shall be located within the following distance from the aerodrome of departure:

(1) for aeroplanes having two engines, not more than a distance equivalent to a [flight time](https://avioverse.aero/glossary/easa/flight-time) of 1 hour at the single-engine cruise speed in still air standard conditions; and

(2) for aeroplanes having three or more engines, not more than a distance equivalent to a flight time of 2 hours at the one-engine-inoperative (OEI) cruise speed according to the AFM in still air standard conditions.

(c) For an aerodrome to be selected as a take-off alternate aerodrome the available information shall indicate that, at the estimated time of use, the conditions will be at or above the aerodrome operating minima for that operation.

IR · SPO.OP.145 — Regulation (EU) No 965/2012 · Regulation (EU) 2021/2237 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026

[All rules in SUBPART B: OPERATIONAL PROCEDURES](https://avioverse.aero/regulations/easa/air-ops/part-spo/subpart-b)

Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.