I have my doubts. When you think about it, if the Navy trusted the Army there would be no Marine Corps, and if the Army trusted the Navy there would be no ships in the Army.
You missed a service! Not only does the Army have more ships than the Navy, but it has more aircraft than the Air Force! Maybe for the same reason. :-)
if the Army trusted the Navy there would be no ships in the Army.
Its not so much a case of trust as necessity. The Navy takes care of its own, and the needs of other services are secondary the Navys funding is based on supporting the Marines, not the Army.
If an Army Battalion Commander needs amphibious support from the Navy, the request has to go through channels at one time all the way to the Theater Commander. If the Navy has boats setting around uncommitted, the Army Commander might get them. If the request goes to the Army, it goes to the local Transportation Group Commander. Its much quicker and more likely to be approved.