B737 Next Generation Undifferentiated
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 178
Situational Awareness; Training / Qualification
No Specific Anomaly Occurred All Types
General None Reported / Taken
Human Factors
This was our second time into LGA that day. Weather was excellent VFR all day; and LGA was using Runway 22 for arrivals.  First time through; the approach was visual; backed up by the ILS 22; as we do many times. On this flight; LGA was advertising the LDA-A to 22; which neither of us had ever done before. The approach frequency was; as usual; very congested; so I was not able to ask why they were utilizing the LDA instead of the ILS.  This approach is; of course; a circling approach.  The weather was well above 1000/3; and we verified in the FOM that we are indeed approved to fly LDA approaches so I am confident that we were legal.My concern is that flying this approach was 'disorienting' because of the 10 degree offset; and the fact that there are no published descent rates with the corresponding ground speeds. It just doesn't seem to 'fit' with our procedures.  I really wanted to turn and line up with the runway centerline; but had to fly through to join the LDA.  Looking back; had the weather been closer to 1000/3; I don't think I would have been comfortable flying this approach.We could have told Approach we were unable to fly that approach; but I couldn't predict my level of discomfort until we actually flew it.  Could Jeppesen publish an LDA 22; with corresponding descent rates that would more closely align with our procedures?
B737 Captain described the LDA-A Runway 22 Approach at LGA as 'disorienting' because of the 10 degree offset during a VMC approach.