Abstract: An embodiment of an inventive method for measuring pressure provides for a reference environment and an ambient environment. The reference environment is internal to a receptacle and has a reference fluid pressure. The ambient environment is external to the receptacle and has an ambient fluid pressure. Equalization of the reference pressure and the ambient pressure with respect to each other is effected by enabling and disenabling fluidic passage between the reference environment and the ambient environment. The fluidic passage is enabled until the reference pressure and the ambient pressure are equal, and is then disenabled to stabilize the equalized reference pressure. After the reference pressure and the ambient pressure are equalized, a differential pressure is measured between the equalized reference pressure and the ambient pressure. Inventive pressure measurements may be conducted, for example, repeatedly in association with a moving underwater model at various water depths and vehicular speeds.