WWI German Bullion Badges, Air Force, Navy, etc.

[Stormfighter]

I just picked up a very nice lot from the son of a World War II veteran. Among the group were two German World War I Air Force badges (I assume they are cap badges), a Navy cap badge, and an embroidered badge having the letters BAC. Can anyone identify these badges fro me? Any help would be greatly appreciated.

Barry

[Stormfighter]

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[kaiserwilhelm2]

The one with the anker has the Bavarian coat of arms on it.

[Brian L.]

My guess would be that the "BAC" badge stands for 'Bayerische Aero Club'.