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Preset Map 15 Preset Map 16
User Defined Fleet Maps
Type I Programming Information
When a Type I system is designed, the address information for all the ID’s is
divided into 8 equal sized blocks, numbered 0–7. When you program your scanner
to track a Type I system, you must select a size code for each of these blocks.
When you have assigned a size code to all 8 blocks, you’ll have defined the fleet
map for the system you are tracking. Each size code determines the number of
fleets, subfleets, and ID’s each block will have. For example, a size code of S-4
has one fleet, which is divided into 16 separate subfleets, and it has a total of 512
individual ID’s.
When a block is assigned a size code, the fleet or fleets created within the block
are assigned a Type I ID. The way these ID’s display on your scanner depend on
the block number and the block’s size code. When a Type I ID appears, the
leftmost digit represents the block which contains the ID.
The next 2-3 digits identify which fleet is active, and the last digit(s) identifies the
subfleet.
The details concerning how the size codes are selected by a Type I System
designer are highly dependent on the specific needs of the system’s users. Some
organizations might want many subfleets with only a few radios each, while
another organization might want only a few subfleets with many radios each. Your
task is to program your fleet map with the same size code assignments as the
trunked system. If you do this accurately, you’ll track all the Fleet-Subfleet
combinations used by the system. In other words, you’ll hear complete
communications while monitoring a trunked system.
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
Block Size Code Block Size Code
0 Size Code 4 0 Size Code 3
1 Size Code 4 1 Size Code 10
2 Size Code 4 2 Size Code 10
3 Size Code 11 3 Size Code 11
4 Size Code 11 4 Size Code 0
5 Size Code 0 5 Size Code 0
6 Size Code 12 6 Size Code 12
7 (Size Code 12) 7 (Size Code 12)