From 05671b42d51a81f36a6e62a605817019be134ef3 Mon Sep 17 00:00:00 2001
From: "Gary E. Miller" <gem@rellim.com>
Date: Thu, 7 Mar 2019 18:29:05 -0800
Subject: NMEA doc: Add $PGRME, tweak xxGPS.

---
 www/NMEA.adoc | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

(limited to 'www')

diff --git a/www/NMEA.adoc b/www/NMEA.adoc
index 0ab2c319..6c2ab428 100644
--- a/www/NMEA.adoc
+++ b/www/NMEA.adoc
@@ -989,9 +989,9 @@ radiotelephone.
 Field Number:
 
 1. UTC time of the GGA or GNS fix associated with this sentence
-2. Expected error in latitude (meters)
-3. Expected error in longitude (meters)
-4. Expected error in altitude (meters)
+2. Expected 1-sigma error in latitude (meters)
+3. Expected 1-sigma error in longitude (meters)
+4. Expected 1-sigma  error in altitude (meters)
 5. ID of most likely failed satellite (1 to 138)
 6. Probability of missed detection for most likely failed satellite
 7. Estimate of bias in meters on most likely failed satellite
@@ -2414,6 +2414,23 @@ Field Number:
 
 Example: $PGRME,15.0,M,45.0,M,25.0,M*22
 
+=== PGRMZ - Garmin Altitude ===
+
+------------------------------------------------------------------------------
+        1  2  3  4
+        |  |  |  |
+ $PGRMZ,hhh,f,M*hh<CR><LF>
+------------------------------------------------------------------------------
+
+Field Number:
+
+1. Current Altitude Feet
+2. f=feet
+3. Mode (1 = no fix, 2 = 2D fix, 3 = 3D fix)
+4. Checksum
+
+Example:  $PGRMZ,2282,f,3*21
+
 === PMGNST - Magellan Status ===
 
 ------------------------------------------------------------------------------
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