In aviation, in Australia, Canada, New Zealand, South Africa, the United Kingdom and elsewhere, HASELL or alternatively HASEL, is a standard mnemonic to prompt a series of checks prior to carrying out many types of manoeuvres, such as stalls, spinss, spiral dives or aerobatics.

The HASEL acronym stands for:

• Height

• Area

• Security

• Engine

• Lookout

or alternatively:

• Height

• Airframe

• Security

• Engine

• Location

• Lookout

HASELL is often abbreviated to HELL for any subsequent manoeuvres.

The Area or Location check can be broken down into the following checks with the mnemonic ABCCD:

• Active airfields

• Built up areas

• Cloud

• Controlled airspace

• Danger areas

References