Fleet Map Size Codes - Uniden BC 245XLT Owner's Manual

If you don't already know the size codes used, you'll have
to guess at them. But since you don't have to figure out all
the blocks at once, this isn't as hard as it seems. Select a
size code for a block, and then press
communications. If you decide you are receiving most of
the replies to the conversations with IDs assigned to the
block you just programmed, then you've probably selected
the right size code and can work on the next block of the
map.
Finally, for most public safety systems there are some size
codes which are more common. S-3 and S-4 are probably
the most common, followed by S-10, S-11, and S-12.

Fleet Map Size Codes

Size
S–0
S–1
S–2
S–3
S–4
S–5
S–6
S–7
S–8
S–9
S–10
S–11
S–12
S–13
S–14
Fleets Subfleets
Reserves block for Type II IDs
128
16
8
1
64
32
32
16
8
4
2
1
1
1
IDs
4
8
8
16
4
8
4
4
4
8
16
16 1024
16 2048
16 4096
82
. Now listen to the
Blocks
Used
16
64
128
512
32
32
64
128
256
256
256
+
1
1
1
1
1
1
1
1
1
1
1
2
4
8