Battlefield 6’s Season 4 roadmap set July 21 for its opening phase. The naval vehicles described here apply to Tsuru Reef and the later Wake Island, not every multiplayer map.
The launch update adds Tsuru Reef, a large island map with beaches, open water, aircraft, ground vehicles, and infantry areas. It is built so boats are part of the normal match instead of being limited to a separate mode.
New naval vehicles
The RCB-90 patrol boat is the larger combat option. It is armored and built to control the coastline.
EA describes the RHIB as four-person transport, while the RCB-90 offers a shoreline ramp that supports team spawning. That makes the choice about reinforcing a position versus moving a smaller group, not just comparing armor.
Season 4 also adds a dynamic wave system. The ocean can change while a match is happening, which can affect visibility, vehicle movement, and how easy it is to aim from the water.
Weapons and updates
The season launches with new weapons, including the EF88 assault rifle, BROD 3 carbine, and VSSM designated marksman rifle.
The required update also includes many fixes and changes for movement, vehicles, water interaction, menus, audio, and Portal tools. Players who want exact balance numbers should read the full update notes.
More content is coming
Wake Island appears in the roadmap’s August 18 phase. EA says it is being rebuilt for Battlefield 6 while keeping the basic identity of the older map.
The roadmap listed a Top Gun event for August 18 and Tidal Strike for September 15. Those are announced phase dates, not independent confirmation of delivery.
On the named naval maps, the changes add routes and fighting positions on water. This report does not verify that every subsequent roadmap phase shipped as scheduled.
Roadmap versus vehicle guide
EA's roadmap explains when the season's maps, events, and weapons are planned. The separate sea-vehicle guide explains the role of the patrol boat and RHIB in actual matches. Used together, the sources show why Tsuru Reef is more than a map with water around it: the larger boat is built for control and protection, while the smaller craft favors speed and access.
That difference creates a basic squad decision. A team using the patrol boat may be able to hold a coastline, but it presents a larger target. A RHIB can move a squad quickly through tighter routes, but it gives up protection. Dynamic waves add another variable because visibility and aim can change even when the route is familiar.
A season released in stages
July 21 is the start of Season 4, not the date for every listed feature. Wake Island, the Top Gun event, and Tidal Strike occupy later points on the roadmap. Players returning for one item should check its individual date rather than assuming the full season arrived in the first update.
The official material supports a clear assessment: naval combat can change movement and positioning on the maps designed to support it. Whether it improves Battlefield 6 will depend on map balance, vehicle counters, and how often infantry players can influence the water fight. Those questions need live play and later patch notes, not roadmap promises alone.