# Sandel **URL:** \ **Category:** Guest Discussion\ **Created:** [November 4, 2001, 5:03pm UTC](https://forum.cirruspilots.org/t/sandel/39224 "2001-11-04T17:03:29Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![pgemis](https://avatars.discourse-cdn.com/v4/letter/p/8e8cbc/32.png) [@pgemis](https://forum.cirruspilots.org/u/pgemis)\ **Post date:** [November 4, 2001, 5:03pm UTC](https://forum.cirruspilots.org/t/sandel/39224/1 "2001-11-04T17:03:29Z")
As I am trying to justify the Sandel HSI to replace the electromechanical HSI, I wonder if Sandel will provide the glideslope indication of LAAS GPS based precision approaches. ---
**Author:** ![dkatz42](https://avatars.discourse-cdn.com/v4/letter/d/d26b3c/32.png) [@dkatz42](https://forum.cirruspilots.org/u/dkatz42)\ **Post date:** [November 4, 2001, 8:59pm UTC](https://forum.cirruspilots.org/t/sandel/39224/2 "2001-11-04T20:59:51Z")
I suspect that any CDI will display the glideslope on WAAS and LAAS approaches, as it is driven by a simple analog interface in any case. The pertinent question will be whether the GNS 430 will support WAAS or LAAS (I think the 430 is officially “WAAS-ready” which doesn’t mean a whole lot) and how much extra hardware will be necessary to make it so. ---
**Author:** ![robert](https://avatars.discourse-cdn.com/v4/letter/r/e95f7d/32.png) [@robert](https://forum.cirruspilots.org/u/robert)\ **Post date:** [November 7, 2001, 5:39am UTC](https://forum.cirruspilots.org/t/sandel/39224/3 "2001-11-07T05:39:16Z")
The glideslope signal from the 430 to the Sandel is not analog, it is a digital ARINC 429. The Sandel can take many different inputs, including analog and ARINC 429, but sensibly, Cirrus uses the ARINC 429. I am glad I have the Sandel. I’ve never heard of someone who had one who regretted spending the money. They seem to be a lot more reliable than anything from Century or Garmin.