There are not only perks and skills for crew members, but also different additional equipment which can be installed on vehicles.
Among all additional equipment there are 4 items, which will be useful on every vehicle.
1. Tank gun rammer
2. Enhanced gun laying drive
3. Camouflage net
4. World of Tanks improved ventilation
Only three of such additional items can be installed on one tank due to only three slots available. That’s why the camouflage net is not necessary for tanks, and the wot improved ventilation is not necessary for tank destroyers and artillery.
There are also three slots for additional usable items, also known as consumables. The most common set is: Small First Aid Kit, Small Fire Extinguishers and Small Repair Kit. If some item wasn’t used during the fight, then it will stay installed on your tank and will be available for next battle.