I have heard a lot of people say if you can hear [the repeater], you can generally work it [the repeater]. However, I hear an awful lot of people saying they could hear the repeater clearly but no one came back to them. And on this end, all I heard was a lot of static. So just by kerchunking the repeater may not mean your voice transmitted over it. Depends on the repeater antenna and the repeater sensitivity. With only 5 watts and a questionable antenna, the handheld may hear the repeater but the 5 watts may not carry the voice to be heard. To me the general rule is to use the hand held for monitoring but use a mobile radio AND antenna for transmitting. And for 55 kms. another rule would be that inside a building or vehicle, a lot of the transmit signal is blocked so an outside antenna is advised. Also, some stock antennas are not that great and a better antenna is suggested [this is discussed in other threads on the RR site or look at hand held antennas on eham.com]. As with any radio, the rule of line of sight applies. So if inside a building or vehicle, it is not true line of sight. Being close to a window in a building may help, but is not guaranteed. If you are 55 kms or more from repeaters, a mobile in the base or vehicle with an outside antenna will be better. Hopefully, someone on here from Sask. will be able to help more. As a last note, I am not certain if a tone is required to get into the repeaters in your area. You will be able to hear the repeater but not access it.