Speed Sonic Boom - Measure Your Speed in Minecraft
This mod allows you to track your speed in Minecraft, displaying current velocity in meters per second for both your character and any vehicle you're riding.
When you or your vehicle reach 343 m/s, you'll hear a distinctive sonic boom. Interestingly, the sound differs depending on whether you're riding something or moving independently.
The measurement system automatically switches from meters per second to the Mach scale upon breaking the sound barrier. At 343 m/s it shows "mach 1", at 686 m/s - "mach 2", and so on, up to the maximum value of "mach 10+".
For true extremists: if you somehow manage to reach light speed (299,792,458 m/s or higher), the indicator changes to "Speed of Light", and your screen momentarily turns black, emphasizing the incredible nature of such an achievement.

This mod is perfect for testing various movement methods in the game and determining the fastest transportation available.