You get what you test.
It is a simplistic, possibly blunt way of saying that at-sea dynamic interface flight testing depends on a multitude of factors, primarily ship and aircraft availability and weather conditions. And it is expensive. All of those factors often limit wind-over-deck launch and recovery envelopes in which rotorcraft are permitted to operate to and from U.S. Navy air-capable ships.
The Dynamic Interface Virtual Environment program is an Office of Naval Research technology transition initiative aimed at developing, validating, and implementing modeling and simulation tools that can augment and ultimately reduce or eliminate the amount of live flight testing.
What does Navy testing have to do with an Army research and development center? CRUSAID.