diff --git a/src/disaster_cmd.cpp b/src/disaster_cmd.cpp
--- a/src/disaster_cmd.cpp
+++ b/src/disaster_cmd.cpp
@@ -99,13 +99,13 @@ static const SpriteID _disaster_images_8
 static const SpriteID _disaster_images_9[] = {SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1, SPR_ROTOR_MOVING_1};
 
 static const SpriteID * const _disaster_images[] = {
-	_disaster_images_1, _disaster_images_1,                     // zeppeliner and zeppeliner shadow
-	_disaster_images_2, _disaster_images_2,                     // small ufo and small ufo shadow
-	_disaster_images_3, _disaster_images_3,                     // combat aircraft and shadow
-	_disaster_images_8, _disaster_images_8, _disaster_images_9, // combat helicopter, shadow and rotor
-	_disaster_images_6, _disaster_images_6,                     // big ufo and shadow
-	_disaster_images_7, _disaster_images_7,                     // skyranger and shadow
-	_disaster_images_4, _disaster_images_5,                     // small and big submarine sprites
+	_disaster_images_1, _disaster_images_1,                     ///< zeppeliner and zeppeliner shadow
+	_disaster_images_2, _disaster_images_2,                     ///< small ufo and small ufo shadow
+	_disaster_images_3, _disaster_images_3,                     ///< combat aircraft and shadow
+	_disaster_images_8, _disaster_images_8, _disaster_images_9, ///< combat helicopter, shadow and rotor
+	_disaster_images_6, _disaster_images_6,                     ///< big ufo and shadow
+	_disaster_images_7, _disaster_images_7,                     ///< skyranger and shadow
+	_disaster_images_4, _disaster_images_5,                     ///< small and big submarine sprites
 };
 
 static void DisasterVehicleUpdateImage(Vehicle *v)
@@ -1029,14 +1029,14 @@ static const struct {
 	Year min;
 	Year max;
 } _dis_years[] = {
-	{ 1930, 1955 }, // zeppeliner
-	{ 1940, 1970 }, // ufo (small)
-	{ 1960, 1990 }, // airplane
-	{ 1970, 2000 }, // helicopter
-	{ 2000, 2100 }, // ufo (big)
-	{ 1940, 1965 }, // submarine (small)
-	{ 1975, 2010 }, // submarine (big)
-	{ 1950, 1985 }  // coalmine
+	{ 1930, 1955 }, ///< zeppeliner
+	{ 1940, 1970 }, ///< ufo (small)
+	{ 1960, 1990 }, ///< airplane
+	{ 1970, 2000 }, ///< helicopter
+	{ 2000, 2100 }, ///< ufo (big)
+	{ 1940, 1965 }, ///< submarine (small)
+	{ 1975, 2010 }, ///< submarine (big)
+	{ 1950, 1985 }  ///< coalmine
 };