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Tri Pacer Pilot wrote:

> 2. Trade the ADF, DME and GPS/COM for a Garmin GNS430 even up.
> Installation and certification $1400.

Wow! I would say "go for it!"

> I know that the IFR GPS will substitute for an ADF and DME in most cases.
> But Im hung up because RYN has a departure procedure that involves a climb
> in a hold using the RYN NDB as a fix. Its butt-easy using an ADF. Is it
> going to be harder using only a GPS?

I dont think so. If youre using GPS as an NDB substitute, you dont
have to have the DP in the data base. You just call up the NDB (easiest
on mine is use the NRST button), hit "hold" button to suspend sequecing,
and if you like input your desired course. Then fly the hold.

The precision and situational awareness are both improved IMO.

> Can I even do it if its not in the database?

No, but any NDB which is part of standard instrument procedures should
be in the database.

> Can you add a hold at a waypoint to a flightplan in the 430?

I dont know, but in any IFR GPS you can suspend waypoint sequencing
by hitting a single button and hold at at that waypoint, which certainly
provides the capabilities of an ADF.

> Ive already solved the usual voltage, installation, certification issues.
> I know that the RYN NDB is in the database, but the RYN Obstacle Departure
> (by NOTAM, not published as a SID) is not.

You dont need to have an obstacle departure, or any DP or STAR, in your
GPS to fly it IFR; simply the navaids upon which the procedure is based.

Cheers,
Sydney

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