The instruments, of civilian manufacture, were the same.  The surgical kit of an army physician was identical to that of a Navy physician.  A surgical scalpel was a surgical scalpel, a tourniquet a tourniquet was a tourniquet, the treatment of choice for a shattered limb, amputation.  After all, many Army and Navy surgeons on both sides attended the same medical schools.  The drugs of choice were the same.

But what was different was the environment in which Navy physicians practiced.