@The_Good_Captain Here is the “Phase 1: Advance Convoys” section of the rules in the latest version of the Rulebook (which I don’t believe has yet been posted):
All of your reinforcement land units and supply tokens in the Casablanca and Mediterranean convoy sea zones must advance into the corresponding ports now (with two exceptions, see below). You must also move your air units in those same convoy sea zones up to 2 spaces to land in friendly-controlled territories (possibly including the convoy’s destination port). Any air units that cannot land are immediately destroyed. The presence of enemy units in the convoy sea zone does not interfere with this movement.
On the United Kingdom’s turn, land and air units and supply tokens in the Suez Canal convoy sea zone advance to Cairo, while sea units there advance to sea zone 31.
Movement out of the above convoy sea zones in this phase doesn’t count against these arriving units’ movement allowance (see “Land Unit Movement," page 15, and “Air Unit Movement” and "Sea Unit Movement,” page 16), so they may move and fight normally in the remainder of your turn.
Sea units do not move with convoys into ports. They only move under their own power.
On the UK’s turn, all of the units in the Atlantic Ocean and Indian Ocean convoy sea zones must then follow the arrows and advance into the next convoy sea zone. These units may not move further in this or any other phase of the same turn.
Exception: If a convoy arrival fills the destination port to capacity (the stacking limit, see page 10), any excess land units are stuck in the convoy sea zone until there is room for them to arrive in a future turn (assuming they survive until then). To avoid overloading a port territory, you may wish to hold reinforcements for later convoys (see “Phase 6: Deploy Reinforcements and Assign Convoy Escorts,” page 25), but if you are sure you’ll take some convoy losses, sending excess units might work out.
As you can see, air units in the Suez Canal convoy sea zone must advance to Cairo.
