Beyond the Basics
The next two or three digits identify which fleet is active, and the last digit(s) identifies the subfleet.
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
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 SRCH. 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. Size code 3 and size code 4 are probably the most common, followed by size codes 10, 11, and 12.
Fleet Map Size Codes
| Size | Fleets | Subfleets | IDs | Blocks Used |
|
|
|
|
|
|
|
|
| 0 |
| Reserves block for Type II IDs |
|
| |
|
|
|
|
|
|
|
| 1 | 128 | 4 | 16 | 1 |
|
|
|
|
|
|
|
|
| 2 | 16 | 8 | 64 | 1 |
|
|
|
|
|
|
|
|
| 3 | 8 | 8 | 128 | 1 |
|
|
|
|
|
|
|
|
| 4 | 1 | 16 | 512 | 1 |
|
|
|
|
|
|
|
|
| 5 | 64 | 4 | 32 | 1 |
|
|
|
|
|
|
|
|
| 6 | 32 | 8 | 32 | 1 |
|
|
|
|
|
|
|
|
| 7 | 32 | 4 | 64 | 1 |
|
|
|
|
|
|
|
|
| 8 | 16 | 4 | 128 | 1 |
|
|
|
|
|
|
|
|
| 9 | 8 | 4 | 256 | 1 |
|
|
|
|
|
|
|
|
| 10 | 4 | 8 | 256 | 1 |
|
|
|
|
|
|
|
|
| 11 | 2 | 16 | 256 | 1 |
|
|
|
|
|
|
|
|
| 12 | 1 | 16 | 1024 | 2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
69