From 80989c4beeb38172e860d92c94c576e765fb5384 Mon Sep 17 00:00:00 2001 From: Dominic Clifton Date: Wed, 15 Oct 2014 09:32:57 +0100 Subject: [PATCH] Update Sonar docs. --- docs/Sonar.md | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/docs/Sonar.md b/docs/Sonar.md index a9afa047e5..f708a0ef90 100644 --- a/docs/Sonar.md +++ b/docs/Sonar.md @@ -1,9 +1,11 @@ # Sonar -A sonar sensor can be used to measure altitude for use with altitude hold modes. +A sonar sensor can be used to measure altitude for use with BARO and SONAR altitude +hold modes. + +The sonar sensor is used instead of the pressure sensor (barometer) at low altitudes. +The sonar sensor is only used when the aircraft inclination angle is small. -The current sensor takes over from the pressure sensor at low altitudes, but only when -the angle of the aircraft is small. ## Hardware