When opening a watertight door with individual dogs, which side should be opened first?

When opening a watertight door equipped with individual dogs, the proper procedure is to begin with the hinge side of the door. This is crucial because starting with the hinge side helps to relieve pressure and allows the door to swing more freely as it is being opened. Focusing on the hinge side first ensures that any potential stretching or binding of the door frame is avoided, which might occur if the non-hinge side is released first.

In addition, opening the hinge side first promotes safety by minimizing the risk of the door unexpectedly swinging or catching on the frame. This is particularly important in situations where water or pressure differences may be present on either side of the door, as it allows personnel to control the opening process more effectively.

The methodology of opening the hinge side first is standard practice in damage control operations, following established protocols to ensure safety and efficiency during emergency situations.