diff --git a/AUDIO/IsAnyPositionalSpeechPlaying.md b/AUDIO/IsAnyPositionalSpeechPlaying.md
index 2867cd662..6f7244581 100644
--- a/AUDIO/IsAnyPositionalSpeechPlaying.md
+++ b/AUDIO/IsAnyPositionalSpeechPlaying.md
@@ -9,9 +9,11 @@ aliases: ["0x30CA2EF91D15ADF8"]
 cs_type(Any) BOOL IS_ANY_POSITIONAL_SPEECH_PLAYING();
 ```
 
+Determines if any ped-independent, positionally-based scripted speech is currently active. This typically includes speech events triggered using [`PLAY_AMBIENT_SPEECH_FROM_POSITION_NATIVE`](#_0xED640017ED337E45).
+
 ```
 NativeDB Introduced: v2189
 ```
 
 ## Return value
-Returns true if any ped-independent positional scripted speech (ie. triggered using [PLAY_AMBIENT_SPEECH_FROM_POSITION_NATIVE](#_0xED640017ED337E45)) is currently playing
+Returns `true` if any ped-independent positional scripted speech (i.e. triggered using [PLAY_AMBIENT_SPEECH_FROM_POSITION_NATIVE](#_0xED640017ED337E45)) is currently playing, `false` otherwise.
diff --git a/VEHICLE/ForceSubmarineNeurtalBuoyancy.md b/VEHICLE/ForceSubmarineNeurtalBuoyancy.md
new file mode 100644
index 000000000..6ce1167d5
--- /dev/null
+++ b/VEHICLE/ForceSubmarineNeurtalBuoyancy.md
@@ -0,0 +1,20 @@
+---
+ns: VEHICLE
+aliases: ["0xC67DB108A9ADE3BE"]
+---
+## FORCE_SUBMARINE_NEURTAL_BUOYANCY
+
+```c
+// 0xC67DB108A9ADE3BE
+void FORCE_SUBMARINE_NEURTAL_BUOYANCY(Vehicle submarine, int time);
+```
+
+Forces a submarine to maintain neutral buoyancy for a specified duration, preventing it from rising when unoccupied or without a driver.
+
+```
+NativeDB Introduced: v2189
+```
+
+## Parameters
+* **submarine**: The submarine vehicle to apply neutral buoyancy to.
+* **time**: The duration in milliseconds for which to maintain neutral buoyancy.
diff --git a/VEHICLE/GetSubmarineCrushDepthWarningState.md b/VEHICLE/GetSubmarineCrushDepthWarningState.md
deleted file mode 100644
index 1e99e34b4..000000000
--- a/VEHICLE/GetSubmarineCrushDepthWarningState.md
+++ /dev/null
@@ -1,16 +0,0 @@
----
-ns: VEHICLE
----
-## _GET_SUBMARINE_CRUSH_DEPTH_WARNING_STATE
-
-```c
-// 0x093D6DDCA5B8FBAE
-int _GET_SUBMARINE_CRUSH_DEPTH_WARNING_STATE(Vehicle submarine);
-```
-
-```
-NativeDB Introduced: v2189
-```
-
-## Parameters
-* **submarine**:
diff --git a/VEHICLE/GetSubmarineIsBelowFirstCrushDepth.md b/VEHICLE/GetSubmarineIsBelowFirstCrushDepth.md
deleted file mode 100644
index bff96f569..000000000
--- a/VEHICLE/GetSubmarineIsBelowFirstCrushDepth.md
+++ /dev/null
@@ -1,16 +0,0 @@
----
-ns: VEHICLE
----
-## _GET_SUBMARINE_IS_BELOW_FIRST_CRUSH_DEPTH
-
-```c
-// 0x3E71D0B300B7AA79
-BOOL _GET_SUBMARINE_IS_BELOW_FIRST_CRUSH_DEPTH(Vehicle submarine);
-```
-
-```
-NativeDB Introduced: v2189
-```
-
-## Parameters
-* **submarine**:
diff --git a/VEHICLE/GetSubmarineIsUnderDesignDepth.md b/VEHICLE/GetSubmarineIsUnderDesignDepth.md
new file mode 100644
index 000000000..28fa469a0
--- /dev/null
+++ b/VEHICLE/GetSubmarineIsUnderDesignDepth.md
@@ -0,0 +1,22 @@
+---
+ns: VEHICLE
+aliases: ["_GET_SUBMARINE_IS_BELOW_FIRST_CRUSH_DEPTH"]
+---
+## GET_SUBMARINE_IS_UNDER_DESIGN_DEPTH
+
+```c
+// 0x3E71D0B300B7AA79
+BOOL GET_SUBMARINE_IS_UNDER_DESIGN_DEPTH(Vehicle submarine);
+```
+
+Determines if the submarine is operating below its designated crush depth.
+
+```
+NativeDB Introduced: v2189
+```
+
+## Parameters
+* **submarine**: The submarine vehicle to be evaluated for being under its crush depth threshold.
+
+## Return value
+Returns `true` if the submarine is below its designated crush depth, `false` otherwise.
diff --git a/VEHICLE/GetSubmarineNumberOfAirLeaks.md b/VEHICLE/GetSubmarineNumberOfAirLeaks.md
new file mode 100644
index 000000000..3d73aed22
--- /dev/null
+++ b/VEHICLE/GetSubmarineNumberOfAirLeaks.md
@@ -0,0 +1,22 @@
+---
+ns: VEHICLE
+aliases: ["_GET_SUBMARINE_CRUSH_DEPTH_WARNING_STATE"]
+---
+## GET_SUBMARINE_NUMBER_OF_AIR_LEAKS
+
+```c
+// 0x093D6DDCA5B8FBAE
+int GET_SUBMARINE_NUMBER_OF_AIR_LEAKS(Vehicle submarine);
+```
+
+Checks if a Submarine has any air leaks, when there is more than 4 the player will drown.
+
+```
+NativeDB Introduced: v2189
+```
+
+## Parameters
+* **submarine**: The submarine vehicle to check for air leaks.
+
+## Return value
+Returns the number of air leaks on the submarine.
\ No newline at end of file
diff --git a/VEHICLE/N_0xc67db108a9ade3be.md b/VEHICLE/N_0xc67db108a9ade3be.md
deleted file mode 100644
index 3181168a6..000000000
--- a/VEHICLE/N_0xc67db108a9ade3be.md
+++ /dev/null
@@ -1,17 +0,0 @@
----
-ns: VEHICLE
----
-## _0xC67DB108A9ADE3BE
-
-```c
-// 0xC67DB108A9ADE3BE
-void _0xC67DB108A9ADE3BE(Any p0, Any p1);
-```
-
-```
-NativeDB Introduced: v2189
-```
-
-## Parameters
-* **p0**:
-* **p1**: