Breath Bar
From WikiRaider
The Breath Bar, also know as Air Bar, is a Status Bar which plays an important role when diving.
It was introduced in the first Tomb Raider. As long as Lara is under water, the bar will continue to run down. Once it's depleted, Lara will start taking damage to the Health Bar.
Swimming on the surface will gradually restore the bar. Leaving the water will fully replenish the bar at once.
The Breath Bar also appears when Lara is situated in a place where are toxic fumes. This happens for example in the VCI Section of Tomb Raider Chronicles and in The Angel of Darkness levels Derelict Apartment Block and Galleries Under Siege.
