Anvera 55S Partially Sinks in the Miami River: The Role of Fold-Down Terraces
MIAMI, FL – A terrifying Saturday afternoon unfolded this past April 11 along the banks of the Miami River in Florida. A luxury Italian-designed maxi-RIB, likely identified as an Anvera 55S, was involved in a partial sinking that left bystanders in suspense. While the incident resulted in no injuries, it highlighted the dynamic vulnerabilities of this high-performance vessel during an emergency.
As it headed upriver, the Anvera 55S began to progressively lose its trim as the stern sank inexorably.
Rapid Response: Realizing the severity of the situation, the captain managed to pull alongside the nearest dock.
The Rescue: Thanks to this emergency docking, the 6 passengers on board were able to scramble ashore unharmed just as water completely flooded the aft deck.
The video clearly shows the Anvera 55S progressively taking on water at the stern while navigating the Miami River, all while the passengers continue to party, seemingly oblivious to the unfolding danger.
The mystery behind the partial sinking, the cause of which remains unknown, finds a technical explanation in the very structure of this model. Although images show a torn bow tube, attention must necessarily shift to the aft section of the Anvera 55S.
Unlike the bow, which is protected by inflatable tubes that ensured residual buoyancy, the stern section of the Anvera lacks tubes. This area is characterized by the iconic fold-down terraces, which transform the yacht into a vast “beach area” on the water. Therefore, the absence of the buoyancy reserve—typical of RIBs—in that specific section allowed the stern to submerge.
Once the water breached the freeboard, the lack of lateral tubes meant the engine compartment sank without resistance, bringing the vessel to a point of compromised stability.
A video shared on TikTok captured the final stages of the recovery, carried out by a TowBoatUS vessel that proceeded to tow the craft.
The footage shows the Anvera 55S being slowly hauled with its stern and powerful engines entirely submerged.
It was a complex operation, necessary to clear the Miami River channel and transport the MAXI-RIB to a shipyard for technical inspection.
The video thoroughly documents the difficulty of the recovery efforts. The significant displacement of this 17-meter (55-foot) maxi-RIB, combined with the weight of the water taken on board, required massive towing power—meaning the operation, by necessity, proceeded at a snail’s pace.
However, the extensive experience of “Captain Marty” (the profile name that uploaded the recovery video) allowed the complex operation to be completed successfully.
The vessel involved is an Italian-made maxi-RIB, an Anvera 55S, known for its high performance and sophisticated design.
The sinking was facilitated by the design of the stern area, which features fold-down side terraces and lacks traditional inflatable tubes. Without this buoyancy reserve, water entering the engine room caused the vessel's stern to sink.
No. The captain managed to promptly pull alongside a dock on the Miami River, allowing all 6 passengers to make it ashore unharmed.
The cause of the damage to the bow tube is unknown, but it certainly occurred prior to the vessel taking on water. Although visible in the videos, the damaged bow tube was not the cause of the stern sinking. However, it demonstrated how the bow remained afloat—despite the damage—specifically due to the tube’s residual structure, unlike the rear section of the hull.
The incident occurred on Saturday, April 11, in the Miami River, Florida. The videos were published the following day, April 12.
Video Analysis (YouTube): Visual documentation showing the navigation in the Miami River, the progressive sinking of the stern, the emergency docking, and the passengers disembarking.
Video Analysis (TikTok): Footage of the TowBoatUS recovery operations, posted on April 12 by Captain Marty on TikTok.
Technical Specifications: Official technical data sheet from the Anvera shipyard, containing the vessel’s technical specifications and details regarding the fold-down side terraces.
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