Well, a 145.110 repeater will normally have a negative 600khz offset.
I assume you are talking about the 145.110 repeater with callsign W1BRS at Box mountain.
Not only will it have the - offset which you will have to program into your rig, you will also need a 77 hz CTCSS tone on your transmit signal. Your rig may or may not be capable of transmitting this 77 hz tone. CTCSS stands for Continuous Tone Coded Squelch System. The Motorola trade name for that is PL, the General Electric trade name is Channel Guard, the RCA (as if anyone cares about RCA anymore ) is Quiet Channel. Most people call it PL or CTCSS which is its genric name. If you had look carefully at the repeater directory it would have mentioned the negative offset (-) and the PL frequency of 77 hz.
Of course ALL repeaters have offsets, not all have CTCSS needs. Think about how a repeater works and it will become apparent to you that a repeater cannot transmit and receive on the same frequency at the same time.
Yes, yes, yes, I know there has been such a thing as a simplex frequency store and forward repeater before someone says, Yahbut. But when was the last time you saw one? I am betting the first of never. I have never seen, heard, felt, or smelt of one.