The 3 compartments of the Personal Med Bag make it convenient to use in any situation, even for field use. The large main square compartment zips open from the top between the handles and halfway down both sides. The two front compartments of equal size, zip open at different areas to allow a variety of gear to be stored and reduce the chance that the contents will spill out.
The Angus TC-12 is ALS to the extreme. The TC-12 can be used as an ALS kit, able to accommodate all four of the Angus Accessory Modules or a "D" tank in the main body compartment. The size and type of the equipment can change from supplier to supplier, which means your needs constantly change. The TC-12 changes with you!