Israel has begun an evaluation campaign using its air force's fleet of Lockheed Martin F-35I "Adirs" to test locally developed systems and aerial refuelling procedures for the type.

The trials are a key step as the air force works towards initial operational capability for its Joint Strike Fighters.

Aerial refuelling tests have been conducted from Tel-Nof air base using one of the service's Boeing 707 tankers.

Israel received its first of an eventual 50 of the conventional take-off and landing A-model F-35s in late 2016.