// Workers AI · dad joke modeWhat did Hasell say to his friend? "You're a gas, I'm shell-shocked.

For people with the name "Hasell", see Hasell (surname).

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, spins, 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