Palmpilot
Touchdown! Greaser!
A Cessna 182 that I rent has a KLN94 IFR GPS, but the database is not kept up to date. According to the flight manual supplement, you can use it for enroute IFR if you verify the waypoints, but to fly approaches, it says you must have a current database. (I don't remember what it says about terminal use.)
The plane has no DME. Based on the above, it appears that you can use the GPS to substitute for DME in the enroute phase of flight (and possibly the terminal phase) by verifying the waypoints, but what about identifying DME-based stepdown fixes on a VOR-DME approach, such as the one at my home airport (PAO)?
http://download.aopa.org/ustprocs/current/SW-2/pao_vor_dme_rwy_31.pdf
What about the ILS at Santa Rosa (STS), which requires DME for the missed approach?
http://download.aopa.org/ustprocs/current/SW-2/sts_ils_or_loc_rwy_32.pdf
What about substituting for the ADF when the missed approach is at an NDB, like at Livermore (LVK)?
http://download.aopa.org/ustprocs/current/SW-2/lvk_ils_rwy_25r.pdf
If the database were up to date, then clearly all those would be allowed, since none of them involves substituting for the lateral guidance on final approach, but when the database is not up to date, that complicates things.
The plane has no DME. Based on the above, it appears that you can use the GPS to substitute for DME in the enroute phase of flight (and possibly the terminal phase) by verifying the waypoints, but what about identifying DME-based stepdown fixes on a VOR-DME approach, such as the one at my home airport (PAO)?
http://download.aopa.org/ustprocs/current/SW-2/pao_vor_dme_rwy_31.pdf
What about the ILS at Santa Rosa (STS), which requires DME for the missed approach?
http://download.aopa.org/ustprocs/current/SW-2/sts_ils_or_loc_rwy_32.pdf
What about substituting for the ADF when the missed approach is at an NDB, like at Livermore (LVK)?
http://download.aopa.org/ustprocs/current/SW-2/lvk_ils_rwy_25r.pdf
If the database were up to date, then clearly all those would be allowed, since none of them involves substituting for the lateral guidance on final approach, but when the database is not up to date, that complicates things.