diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt
index c22747df4..a8bf50ec1 100644
--- a/Documentation/user-manual.txt
+++ b/Documentation/user-manual.txt
@@ -1356,7 +1356,7 @@ Suunto:::
 	* Eon, Solution Alpha and Solution Nitrox/Vario
 	* Vyper, Cobra, Vytec, Vytec DS, D3, Spyder, Gekko, Mosquito, Stinger, Zoop
 	* Vyper2, Cobra2, Cobra3, Vyper Air and HelO2
-	* D9, D6, D4, D9tx, D6i and D4i
+	* DX, D9, D6, D4, D9tx, D6i and D4i
 
 Uemis:::
 	* Zurich
diff --git a/README b/README
index b869caa51..bc72225d4 100644
--- a/README
+++ b/README
@@ -197,7 +197,7 @@ Suunto
 	Eon, Solution Alpha and Solution Nitrox/Vario
 	Vyper, Cobra, Vytec, Vytec DS, D3, Spyder, Gekko, Mosquito, Stinger, Zoop
 	Vyper2, Cobra2, Cobra3, Vyper Air and HelO2
-	D9, D6, D4, D9tx, D6i and D4i
+	DX, D9, D6, D4, D9tx, D6i and D4i
 Uemis
 	Zurich
 Uwatec
diff --git a/ReleaseNotes.txt b/ReleaseNotes.txt
index 7a6abbd5b..87f21df59 100644
--- a/ReleaseNotes.txt
+++ b/ReleaseNotes.txt
@@ -51,7 +51,8 @@ New in version 3.1 (compared to Subsurface 3.0.2):
 - improved printout formatting and printer dialog
 - support for color printing
 - dive planning: add option for last stop at 6m/20ft
-- native support for the Shearwater Petrel and Heinrichs Weikamp OSTC3
+- added support for Heinrichs Weikamp OSTC3 and Suunto DX
+- native support for the Shearwater Petrel (much faster download)
 - various bug fixes
 
 
@@ -177,7 +178,7 @@ Suunto
 	Eon, Solution Alpha and Solution Nitrox/Vario
 	Vyper, Cobra, Vytec, Vytec DS, D3, Spyder, Gekko, Mosquito, Stinger, Zoop
 	Vyper2, Cobra2, Cobra3, Vyper Air and HelO2
-	D9, D6, D4, D9tx, D6i and D4i
+	DX, D9, D6, D4, D9tx, D6i and D4i
 Uemis
 	Zurich
 Uwatec