Hi guys,
I meant to dive in here a day or two ago but got sidetracked with work and stuff.
The bandplan for the VHF "Hi" part of the radio spectrum (136-174 MHz, more or less) is different in US than it is in Canada. In the US, they operate with 12.5 kHz spacing, which gives you the xxx.xx25 values (or .xx75, etc). In Canada, we still currently use 5 kHz spacing, so you should never see a fourth digit after the decimal be anything but a zero.
Most scanners currently default to the American bandplan (the PSR500 is one exception I know about which has a Canadian setting), and any attempts to program a 5 kHz-spacing frequency will round it to the nearest 12.5 kHz value. Most of the time, the 12.5 kHz value is close enough to the real (5 kHz) value that you will still hear the signal with reasonably good results, but the 5 kHz value is the correct one.
End result, as far as this conversation goes: 142.965 is the correct frequency, but 142.9625 will do in a pinch. Even if your scanner defaults to 12.5 kHz spacing, you should be able to edit the frequency after you enter it and change the spacing ("step", sometimes) and then re-enter the frequency value. If you're comfortable with the audio quality you're getting from the 12.5 kHz spaced frequency value, it's up to you whether or not you "correct" it.