Quel est l'intervalle de temps le plus long où une station de radio amateur peut être en ondes sans s'identifier avec son indicatif d'appel?

Why

An amateur station must identify with its call sign at least every thirty minutes during a transmission and again at the end of the contact. The full explanation — and one for every question — is in Pro.

Practise this section

Regulations and policies is section B-001 of the Basic exam: The rules: who may operate, what the certificate allows, station identification, third-party traffic, what you may and may not transmit, and how ISED regulates the amateur service.

This question in English · All B-001 questions