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