Before collecting Ship Missile Expansions, you'll need to visit the Hangar Bay on Bryyo and upgrade Samus' gunship. Initially your ship will be outfitted with three Ship Missiles - eight further expansions await discovery. Each one grants you an extra maximum missile, up to a total of 11. Summon Samus' gunship with the Command Visor to perform bombing runs on certain objects and hapless foes.
Samus' upgrades | Missile locations | Ship Missile locations
Energy Tank locations | Energy Cell locations