New all in one ADSB Garmin
There is presently no WAAS down this way. Probably differential GPS stations that you're talking about
The point is: if AMSA can do it for boats, why can't CASA do it for aircraft??
Old Akro: WAAS is a DGPS system created by Raytheon for the FAA. Nothing more, nothing less.
The point is: if AMSA can do it for boats, why can't CASA do it for aircraft??
The point is: if AMSA can do it for boats, why can't CASA do it for aircraft??
These G GPS systems are GBAS (Ground Based Augmentation Systems) and are vastly different in that way they operate compared to WAAS which is SBAS (Space Based Augmentation Systems). An SBAS system is more expensive to set up due to the geostationary satellite component.
D GPS has been used in agricultural aviation for years using a local transmitter for correction.
The trouble with with a GBAS system is its coverage is very localised. Ask any boatie how well the D GPS works once they're well off shore.
It is likely the marine D GPS systems in the US and Canada will be switched off as they have been superseded by WAAS which is achieving similar accuracy over a much wider area.
While being not quite so accurate as some GBAS systems SBAS is the best system for aviation giving a very good level of accuracy over a wide area.
I don't think your point is valid re the GBAS being provided for marine and the current lack of SBAS for aviation. One is relatively easy and cheap to set up the other while probably being more cost effective long term requires more technology and up front cost
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Griffo, the original Flarm as used in gliders was under A$1000 and was the size of a packet of cigarettes sitting on top of the glareshield. A number of LEDs in a circle indicated which direction to look and two more gave relative altitude. Both on, means the target is co-altitude.
Only problem was the little low power transmitter and airframe shielding. Different frequency and more power would fix that.
Yeah, I keep a good lookout too, but I keep seeing people who don't see me and who should have.
Only problem was the little low power transmitter and airframe shielding. Different frequency and more power would fix that.
Yeah, I keep a good lookout too, but I keep seeing people who don't see me and who should have.
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New Garmin is still a waste of money
The new Garmin XPDR is still an utter waste of money. The FAA's faulty requirements for NIC and NAC (via RTCA DO-260B and 91.225/91.227) are still massively and unnecessarily OVERSPECIFIED, and unjustified. US Airlines are likely going to get relief to at least 2026 anyway, and the chances of the 2020 compliance date actually holding for the rest of US airspace users (both GA and military and foreign) are virtually nil, since it especially would crush the US GA fleet, which is not equipping at anything like the needed rate to comply by 2020. Hopefully the Schuster Bill will pass, and the FAA will itself be broken up, with a separate ANSP formed, and then an effort can be mounted to finally fix the massively fouled up NextGen which is heading straight for a massive $40B failure (and in turn, fix elements like the FAA's seriously faulty ADS program - e.g., ADS-R [ADS ridiculous?], and LPV [laterally polluting vermin], and WAAS [worthless area augmentation system]), none of which are necessary, appropriate, or efficient at this point [with nearly 100 SVs to be available globally, and capabilities like GBAS/GLS evolving on top of all those SVs].
