Naval Upgrades

 is an upgrade in the Military Monkey Knowledge tree. It increases the pierce of all Monkey Subs and Monkey Buccaneers by +1. It does not have a prerequisite Monkey Knowledge requirement.

Summary
A very simple +1 pierce buff unlocked early on the game that provides a significant benefit to Subs and Buccaneers.

Tips

 * This is very helpful for Grape Shot, as it now increases the pierce amount to 2 per grape, adding much more reliability to the Buccaneer's grouped popping power.
 * The +1 pierce to base Monkey Sub makes the Monkey Sub more reliable for the early-game in many scenarios, especially versus multiple spaced bloons.
 * Airburst Darts also gain +1 pierce per dart, making them more reliable early-game grouped popping power.

Trivia

 * Enabling Naval Tactics essentially restores original pierce for Monkey Buccaneer's dart and grape attacks, 5 pierce and 2 pierce respectively to BTD5 levels.