Pinned - just one ?

Some quick questions from our first game

If a unit is pinned , can they take another pin ?

Can a 3" mortar pin a tank ?

Do you need to spot for each shot if using and open fire order at the same target?

If I call in a 3" mortar it fires two shots , so I roll twice on the fire for effect table ?

A unit is pinned once, but becomes more vulnerable then to aimed fire due to any casualties and increased chance of routing on moral table.

Yes, if you roll 6 on the suppressing table. Or on the anti-tank armour penetration table when you equal the result needed.

Yes, you have to spot each shot you take in aimed fire.

A mortar fires two shots. Ordinarily, Comms test, 1 roll on accuracy, Scatter dice and distance, then 2 rolls for shots.