USS Vicksburg Bridge Hit in Gulf - 21 Boats, 55 Seconds, Convoy Delivered Safe

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[00:00:00]Convoy escort duty in the Persian Gulf is not a mission that allows for strategic distance. The ships being protected, the tankers, the container vessels, the logistics platforms that the global economy moves through the straight of Hormuz cannot go faster than they go, cannot maneuver with the agility of a warship, and cannot defend themselves against anything more threatening than a hostile weather forecast. The warship assigned to protect them must stay close enough to be relevant. Close enough to place its weapons between the threat and the hull it is guarding. Close enough that a fastmoving threat cannot insert itself into the gap between escort and charge before the escort can respond. In the Persian Gulf, close enough means inside the same threat envelope as the vessel being protected, which means inside the same threat envelope as whatever is positioned on the Iranian coastline 23 mi to the north. USS Vixsburg had been escorting the four vessel commercial convoy for 11 hours when the tactical picture changed at 3:14 a.m. The convoy was making 12 knots on a southwesterly heading, transiting toward the straight and the open water beyond it. The Vixsburg was positioned ahead and slightly to the north of the convoy's lead vessel.

[00:01:22]the traditional escort geometry that placed the warship between the formation and the primary threat bearing. The watch team had been monitoring a sector of the northern horizon where the chart showed the Iranian island of Abu Musa, a small territorial possession that the IRGCN had been using as a logistics and staging node for fast boat operations for years. The island's radar emissions had been quiet for 3 hours. This was noted in the watch log and assessed as nominal. The island's electronics operated on irregular schedules that had never been convincingly correlated with threat activity. The assessment was wrong in a specific way. The island's electronics had been quiet because the personnel operating them had shifted to a communication architecture that the Vixsburg's EW suite was not monitoring at the watch configured sensitivity threshold. Not because the architecture was new. It was documented. It was in the threat library, but because the watch configuration had been set for a different threat priority at the beginning of the watch and had not been updated when the convoy entered the Abu Musa approach corridor. The EW supervisor identified the configuration gap at 3:12 a.m. when a routine selfch check of the watch list coverage showed the unmonitored band. He corrected the configuration at 31247 a.m. At 3:1402 a.m., 14 seconds after the configuration correction, the EW suite detected 18 simultaneous emission events in the newly monitored band. 18 fast boat transponders activating simultaneously, not navigating, not communicating, activating their speedrun guidance systems in the specific pattern that preceded an attack approach. The TIO had the detection report at 3:1406 a.m., 4 seconds after the emission events. He called general quarters at 3:1408 a.m. and immediately began sorting the tactical picture that the surface search radar was already starting to resolve. 18 contacts emerging from the island's northern shore, spreading into a formation arc that placed them on approach vectors from the northwest, the north, and the northeast simultaneously.

[00:03:49]Not a single axis of approach. Three axes. an arc designed to stretch the ship's point defense systems across a bearing coverage that no single weapon mount could address without rotating continuously between threat sectors. The contacts were closing at speeds above 40 knots. The Vixsburg's 5-in gun was the first weapon to speak, engaging the nearest contact on the northwest bearing at 3:14 a.m. The round found the first fast boat at 2800 m and removed it from the picture with the flat decisive result of a 5in projectile meeting a fiberglass hull at any range. The second and third rounds were already leaving the barrel before the first had reached its target.

[00:04:35]The gun crew worked the mount in the mechanical focused rhythm that gunnery training produces. Load, fire, track, load, fire, track. While the combat system routed targeting data to the mount at the rate it could process and execute, the forward failank was tasked to the northeast sector contacts, the aft failank to the north sector. The crew served 050 caliber mounts were at their stations, adding their rate of fire to the defensive geometry in the close-in engagement range where the fast boats would arrive if the outer ring weapons failed to stop them. At 3:1519 a.m., 1 minute and 11 seconds after the attack began, the electronic warfare system detected a new emission category from a bearing that was not the island, from the south, from the direction of the Iranian coastline on the Gulf's southern side, the Keshum Island sector, where the intelligence picture had not flagged elevated activity and where the watch team's attention had not been concentrated. The emission was the laser designator signature of a Cornet anti-tankg guided missile system. A laserg guided weapon that used a reflected laser spot on the target to provide terminal guidance to the missile. The signature was brief, less than a second, consistent with a designator that had been activated and immediately deactivated in the tactical discipline of a crew that had been trained not to dwell on the designation signal. The cornet was a weapon the Vixsburg's crew knew from the threat library but had not expected in this engagement geometry. The cornet is a manportable or vehicle-mounted anti-tank missile designed for engagement of armored vehicles at ranges up to several kilometers. Its warhead is optimized for penetrating armor through a shaped charge mechanism against a warship. It is not a primary anti-ship weapon against a warship's bridge structure.

[00:06:37]the glass and steel superructure that houses the navigating bridge, the helm, the navigation systems, and the watch team that operates all of them. A shaped charge warhead delivered by a laserg guided missile is precisely the kind of weapon that achieves disproportionate effect relative to its size. It does not need to flood the ship or destroy the propulsion plant. It needs to disrupt the command architecture that makes the ship function as an intelligent, maneuvering, coordinating entity rather than a moving piece of steel. The Cornet was fired at 3:1522 a.m. 3 seconds after the laser designator emission. The firing position was on the shore of Keshum Island at the island's northwestern point, a position that had been occupied by an IRGC team that had crossed to the island by boat during the preceding 48 hours. And that had set up in a concealed position specifically to address the bearing that a convoy escort would occupy when the convoy was at its current position in the transit corridor. The missile's flight time to the Vixsburg at its firing range was 11 seconds. The EW supervisor detected the firing emission signature at 3:1523 a.m. 1 second after the launch. He broadcast the warning on the internal net at 3:1524 a.m. The watch team on the bridge received the warning with 10 seconds before impact. 10 seconds on a bridge in active combat against a fast boat swarm is not a moment of repose. The officer of the deck was managing the ship's course changes that were creating engagement geometry for the 5-in gun.

[00:08:20]The navigator was tracking the convoy's position relative to the Vixsburg's maneuvering. The helmsman was executing the ordered course changes. The bridge messenger was relaying reports from DC Central. Every person on the bridge was engaged in a task that the ship's survival required. The 10-second warning produced a specific trained response.

[00:08:43]Cover. Move away from the glass. Get down. The watch team executed it. Not all the way. Not completely. Because 10 seconds in a combat bridge environment where every person has a function that cannot be abandoned is not enough time for everyone to achieve the geometry that makes cover most effective. The Cornet struck the Vixsburg's bridge at 3:154 a.m. The shaped charge warhead penetrated the bridgeg's forward glass panel and detonated inside the bridge space. The shaped charges penetrating jet drove through the glass and the aluminum framing and delivered its primary energy into the interior of the bridge before the detonating charges blast and fragmentation effects followed. The interior of the bridge received the combined effects of penetrating jet energy, blast over pressure, and fragmentation from the warhead casing.

[00:09:39]A set of effects that the bridge structure designed for weather resistance and operational functionality rather than ballistic protection could not contain. Six personnel were on the bridge at the moment of detonation. All six sustained injuries from the blast and fragmentation effects. Two were serious enough to require immediate medical intervention.

[00:10:01]Lacerations and blast trauma that the corman arriving at 3:151 a.m. assessed and began treating in the sequence that traumat triage requires.

[00:10:13]Airway, breathing, circulation in the order that keeps the most people functional for the longest time. The other four sustained injuries that were painful, disorienting, and not immediately life-threatening.

[00:10:27]Cuts, bruises, the ringing disorientation of an explosion at close range that makes the world seem distant and the body seem unreliable for a period that is longer than the tactical situation can afford. The helm console was destroyed. The navigating officer's chart table display was destroyed. The electronic chart system was destroyed.

[00:10:49]The speed and heading indicators were destroyed. The internal communication panel on the bridge forward bulkhead was destroyed. The bridge was not navigating the ship at 3:15 a.m. because the bridge no longer had the equipment to navigate the ship. The ship was making 18 knots on the heading it had been on when the helm was destroyed. It would continue making 18 knots on that heading until something changed. Either the propulsion was altered from the engineering control station below or the steering was shifted to the secondary steering position in the aft part of the ship or the ship ran into something that changed the heading by force. The current heading maintained by the autopilot that was still functioning because its electronics were located in the space below the bridge rather than in the bridge itself was taking the Vixsburg on a track that would pass close to Augen, not through but close to the port side of the convoys lead vessel in approximately 3 minutes and 40 seconds.

[00:11:53]The executive officer was at DC Central when the cornet struck. He had been there since General Quarters was called.

[00:12:01]He received the bridge casualty report from the soundpowered telephone at 3:1538 a.m. 4 seconds after the detonation. His response was immediate and sequential.

[00:12:14]He ordered the engineering control station to reduce speed to 5 knots to arrest the ship's forward movement. He ordered the secondary steering to be manned and he moved himself from DC Central to the secondary con position, the aft steering station that could control the ship's heading through the secondary hydraulic system.

[00:12:35]In the 44 seconds it took him to traverse the interior passageway from DC Central to the aft steering space. He arrived at the secondary con at 3:1622 a.m. The ship's speed had been reduced to 7 knots by the engineering control station's response. The autopilot had maintained the original heading. The convoy lead vessel was now 2 minutes and 12 seconds ahead on the current track at the current speed. The executive officer took the con from the aft steering position at 3:1624 a.m. He ordered left 10° rudder from the secondary steering console. A course change that would open the range to the convoy lead vessel and return the Vixsburg to her escort geometry on the convoy's port beam. The secondary steering responded correctly. The ship began to turn. The fastboat engagement had not paused for any of this. The 5-in gun had continued firing throughout the bridge casualty. The gun was operated from the combat information center below the bridge, not from the bridge itself, and the gun crews fire control feed was uninterrupted by the cornet detonation.

[00:13:46]Seven of the 21 fast boats that had launched from the island had been stopped by the 5-in gun in the 2 minutes and 53 seconds between the first engagement and the bridge strike. The failank systems had addressed three more in the northeast and north sectors. The crew served mounts had engaged two that had closed inside the failanks engagement envelope. 12 fast boats remained. At their closing speed, the surviving boats were now between 400 and 800 m from the hull. The TAO and the CIC had taken tactical command of the ship the moment the bridge casualty report arrived.

[00:14:24]not because he had been ordered to, but because the executive officer's movement to the aftcon had placed the tactical decision authority in the CYC by default, and the TAO understood that the defensive engagement could not pause while the command structure reconfigured itself. He continued firing the 5-in gun. He directed the failank systems through the surface engagement mode against the closest inbound contacts. He had the helicopter, the MH60R that had been airborne since the fastboat contacts first appeared on the radar, repositioned to the northwest sector where the failen coverage was thinnest due to the current engagement geometry.

[00:15:07]The helicopter crew engaged three fast boats on the northwest bearing with the door-mounted weapon between 3:15 a.m.

[00:15:14]and 3:1644 a.m. The engagement was at close range.

[00:15:20]The boats were inside 500 m of the Vixsburg when the helicopter achieved firing geometry and it was not clean.

[00:15:28]One boat was destroyed by direct fire.

[00:15:31]One was disabled by fire that destroyed its engine without immediately stopping the hull's momentum. One was turned away by the approach of the helicopter, but not destroyed. The disabled boat's momentum carried it to 140 m off the Vixsburg's port bow before the hull lost enough speed to stop it. The bridge fire was the third simultaneous event. The Cornet warheads detonation had ignited the chart table. The navigation console insulation and the curtain material on the bridge's aft windows. Not a large fire. The bridge was steel lined and the flammable materials were limited. But a fire in an enclosed space where six personnel had been injured, where the smoke would degrade visibility and add to the disorientation of the wounded, and where the fire's heat would compromise the structural integrity of the bridge electronic spaces below if it was not addressed quickly. The damage control team reached the bridge access at 3:158 a.m.

[00:16:32]24 seconds after the detonation, the team leader entered through the aft bridge access.

[00:16:39]The forward access was blocked by fallen debris from the chart table structure that the warheads blast had collapsed and began applying AFF from the charged hose line that his team had been carrying since General Quarters was called. The fire was on three separate surfaces, the chart table, the console face, and the window curtains.

[00:17:01]And the AFF application required moving through a space that was filled with smoke, navigating around four injured personnel who were being attended by the corman, and maintaining a hose line that the team leader's assistant was managing from the access doorway. The bridge fire was knocked down at 3:169 a.m., 55 seconds after ignition. The smoke cleared slowly. The bridgeg's ventilation system was offline because its control panel had been destroyed by the blast. And the team leader opened the bridgewing doors manually to provide natural ventilation while the secondary flooding detail inspected the bridge space for hidden fire paths in the damaged equipment. No hidden fires were found. The bridge fire was declared fully extinguished at 3:1744 a.m. The convoy lead vessel had not been struck. The course change that the executive officer had executed from the aftcon had moved the Vixsburg away from the collision geometry with 90 seconds to spare. The convoy was still making 12 knots on its original heading. The second and third vessels in the convoy had maintained formation. The fourth vessel, a smaller cargo ship trailing the formation, had accelerated beyond its rated speed when the fast boat attack began, adding a knot and a half of additional speed through an engineering decision made by its chief engineer without authorization from the bridge on the reasoning that his ship needed to be somewhere other than where it was as quickly as possible. The remaining fast boats, the ones that had not been engaged, had turned north at 3:1610 a.m. The attack had lasted 2 minutes and 2 seconds from the first contact approach to the last boat's withdrawal.

[00:18:50]In those 2 minutes and 2 seconds, nine fast boats had been stopped and their crews were in the water or on sinking hulls in the northern Gulf. 12 had withdrawn. Three had been engaged by the helicopter at close range. The boat that had coasted to 140 m off the Vixsburg's port bow and lost power was drifting north on the current. Its crew visible to the helicopter's infrared sensor not moving toward the Vixsburg. The boat's engine silent. The threat was over. The executive officer managed the ship from the aftcon for the next 41 minutes while the damage assessment team worked the bridge. The assessment found the helm console, navigation displays, electronic chart system, and internal communications panel as total losses requiring replacement from ship's spares or from the logistic ship. It found the bridge structure, the steel framing, and the overhead intact. It found the forward glass panels destroyed, but the steel framing that held them undamaged.

[00:19:54]The bridge was not navigable until replacement equipment could be installed. The ship was fully navigable from the aftcon for the duration of the time that replacement required. The navigation electronics team began the replacement sequence at 3:31 a.m.

[00:20:10]working from the ship's spare parts inventory that was stored in the forward electronics locker. The helm console replacement, the most complex element of the sequence because it required integration with the ship's steering control system, was the first priority.

[00:20:26]The team had the replacement console installed and tested at 4:47 a.m. The electronic chart system replacement followed at 5:14 a.m. Internal communications were restored at 5:29 a.m. At 5:29 a.m., the bridge was operational.

[00:20:45]Not fully. The navigation aids that required physical calibration could not be completed at sea, but functional for the ship's safe navigation and the convoy escort mission it was continuing.

[00:20:58]The executive officer transferred the con from the aft steering position to the bridge at 5:31 a.m. The convoy completed its transit at 6:44 a.m. and passed through the straight of Hormuz into the open water of the Gulf of Oman.

[00:21:13]All four vessels arrived with their cargo intact. The IRGCN team that had fired the Cornet from Keshum Island had departed their firing position before the Vixsburg's crew had been aware of their existence. They had crossed back to the island before the P8 Poseidon that the fleet commander had vetoed to the Keshum shoreline arrived at 3:28 a.m. The P8 found the firing position, equipment, debris, blast residue, the physical evidence of an occupied hide site, but not the team. The hide had been used and evacuated in the window between the Vixsburg's EW detection of the laser designator and the P8's arrival. 12 minutes. The two seriously injured sailors from the bridge were treated aboard the ship through the night and transferred by helicopter to the medical facility in Bahrain at 7:30 a.m. Both were assessed as stable. The four with minor injuries received treatment and returned to duty. The corman's triage had been correct in every assessment. The sequence of treatment had been correct. The outcome was the best the injury set permitted.

[00:22:24]Here are the numbers when the convoy is through the straight and the bridge is restored. 21 fast boats in the initial swarm formation.

[00:22:33]18 detected on activation. Three additional identified as the engagement developed. Nine boats stopped during the 2-minute engagement. Three boats engaged by the helicopter at close range. 12 boats withdrew. One disabled boat that coasted to 140 m before stopping. 11 seconds from cornet launch to bridge impact. 55 seconds from fire ignition to fire knocked down. Two seriously injured, four lightly injured among the bridge watch team. 41 minutes the executive officer navigated from the aftcon.

[00:23:09]1 hour 55 minutes from bridge loss to bridge restoration. Four vessels delivered through the straight with full cargo. Zero fatal outcomes among the crew or convoy personnel. The attack had been built around a principle that the Iranian strike planners had been refining for years.

[00:23:28]The fastboat swarm is not primarily a weapon. It is a forcing function. It forces the defending ship to commit its attention, its weapons, and its crew to a threat axis that is measurable, trackable, and engageable. While the ship is committed to the swarm, the cornet team on the flank fires at the space the ship cannot protect because its attention is elsewhere. The principle is sound. The execution on this night had been as close to correct as it could have been without defeating the ship. What it had not accounted for was an EW supervisor who corrected a watch configuration gap 14 seconds before the swarm activated. a Bridgewatch team that got down before the detonation and returned to function within seconds of it. An executive officer who was at the aftcon in 44 seconds and a navigation electronics team that had a replacement helm console installed and tested at 447 a.m. The straight is 23 mi wide at its narrowest.

[00:24:30]The Vixsburg held her position in those 23 mi for the entire 11-hour transit and the 2 minutes and 2 seconds of combat in the middle of it. And when the convoy passed through, she held her position until the last vessel was in the open water beyond the constraint. That is what being the ship between the convoy and the threat means. It does not pause when the bridge is on fire.