Do I have to fasten my seatbelt?
al-lac-CIA-re — stress on third syllable. cin-TU-ra — stress on second syllable.
When the seatbelt sign illuminates or during turbulence when unsure of the requirement.
'Allacciare la cintura' (to fasten the seatbelt) is the standard verb used for both car and aircraft seatbelts. 'Devo' (I must, from dovere) expresses obligation. The command from cabin crew is 'Allacciate le cinture di sicurezza' (fasten your seatbelts).
Il segnale della cintura è acceso.
The seatbelt sign is on.
Observation, not a question — return to your seat
Posso alzarmi anche se il segnale è acceso?
Can I get up even if the seatbelt sign is on?
Generally no — wait for it to go off
Come si allaccia questa cintura?
How do I fasten this seatbelt?
The mechanism is demonstrated during the safety briefing
In Italy and throughout the EU, wearing a seatbelt on all commercial flights is mandatory by law whenever the seatbelt sign is illuminated. Cabin crew are authorised to insist. Pilots may illuminate the sign unexpectedly due to sudden turbulence — experts recommend keeping the seatbelt loosely fastened at all times.