Individual "not in fleet" on DSA card clarification

So, random thought moment...
1. Either the clock on the server that hosts this forum does not recognize daylight savings time, or thinks I am in Bermuda.
2. When I registered for the DSA, I got a card that said I am part of "Fleet Indy/46". Is #46 the catchall "not part of a fleet" number, or is there some significance to the #46, as if maybe there used to be a fleet in my area but no longer is, but that fleet number was #46 back in the day when it was active, so i am assigned to it because I am not part of a fleet but was one near here at some time? If your not in a fleet, what does your DSA card indicate?
1. Either the clock on the server that hosts this forum does not recognize daylight savings time, or thinks I am in Bermuda.
2. When I registered for the DSA, I got a card that said I am part of "Fleet Indy/46". Is #46 the catchall "not part of a fleet" number, or is there some significance to the #46, as if maybe there used to be a fleet in my area but no longer is, but that fleet number was #46 back in the day when it was active, so i am assigned to it because I am not part of a fleet but was one near here at some time? If your not in a fleet, what does your DSA card indicate?