Joint staff legs, unlike sea legs, don't appear to come easily to some naval officers. Naval officers seem to take longer to integrate into joint staff assignments than their multiservice counterparts. They initially have difficulty with joint staff coordination procedures, and take longer to learn about the doctrinal roles of the other services. The reasons for their initial difficulties may have something to do with the Navy's institutional subculture.
Naval officers' general ignorance of the Army, for example, is astounding. Perhaps this is because many Naval officers feel that they don't really need the Army, and they would be right. The Army needs them. Army officers view naval vessels as potential fire support and troop movement assets. Army officers are interested in everything the Navy possesses that can kill a potential enemy or block his lines of communication. I have yet to meet a naval officer who has demonstrated an interest in, say, the mechanized division in the attack or brigade infantry tactics.
Another barrier to joint understanding is the well known naval insularity.