TLP:CLEAR · Disclosure is not limited.

Red Sea shipping: Houthi passage controls and continued disruption

Time window: Last 7 days · Audience: General analyst · Type: Situation report · DTG: 2026-11-08 01:18Z · Overall confidence: HIGH

BLUF

Reporting indicates Bab al-Mandab remains passable but subject to Houthi passage screening. UKMTO reported no attacks on shipping in the Red Sea or Bab al-Mandab during its latest reporting week, while transit levels remained 24% below the pre-blockade benchmark. The evidence points to selective pressure, not a confirmed closure; the near-term attack outlook is less certain, particularly for Saudi-linked ships.

Executive summary

UKMTO reported no attacks on shipping in the Red Sea or Bab al-Mandab during the week ending 6 November and identified 24 August as the date of the last attack. UKMTO separately assessed explosions near a tanker on 4 October as spillover from fighting on land, not intentional targeting of the vessel. Bab al-Mandab transits remained 24% below the level before the blockade benchmark cited by UKMTO. Major-media reporting citing crew testimony and emails describes ships requesting Houthi passage approval, including a reported seven-day permit for the Chinese container ship Zhong Cheng Zhang Ling. The Houthis claimed 1,083 ships crossed in October, a figure not independently confirmed in the supplied reporting. The screening criteria remain unclear: one Houthi statement described Saudi-affiliated ships as excluded from safe passage, while a captain seeking approval said the vessel had no links to Israel, the UK or the US. A separate UKMTO count of 11 attacks this week concerns the Strait of Hormuz and Arabian Gulf, not the Red Sea.

Change from previous assessment

Since the 7 November brief, the core assessment is unchanged: Houthi passage pressure is likely, but the supplied reporting does not establish a complete physical closure. This update adds a reported seven-day permit for Zhong Cheng Zhang Ling and the Houthis' claim of 1,083 October crossings. It also makes the current attack picture more specific: UKMTO reported no Red Sea or Bab al-Mandab attacks in its latest weekly reporting, while separately classifying the 4 October tanker-area explosions as spillover. Confidence remains low on the near-term risk to Saudi-linked ships because the Houthi screening criteria and the scope of the reported ban are unresolved.

Key judgments

1. The Houthis are very likely to continue operating a passage-request and approval system for ships transiting Bab al-Mandab over the next 0-14 days. Reports describe requests by commercial ship captains, replies within 24 hours and a seven-day permit for Zhong Cheng Zhang Ling. This is an assessed forecast based chiefly on reporting about crew testimony, emails and one reported permit; the eligibility criteria are inconsistent across accounts. (Confidence: medium · ASSESSED)
   • I&W: Ship operators or crews report new Bab al-Mandab passage requests receiving Houthi replies or permits. (0-14 days)
   • I&W: Shipping operators report that the Houthis have stopped processing passage requests and vessels are transiting without contacting the Houthi system. (0-14 days)
2. Commercial traffic through Bab al-Mandab is likely to remain below its pre-blockade benchmark over the next 1-3 months, but a complete physical closure is not established. UKMTO reports transits 24% below its benchmark; the Houthis claim 1,083 ships crossed in October, and one Chinese container ship reportedly received a transit permit. The October crossing figure is a Houthi claim, not an independently confirmed count, and reporting differs on the year of the blockade announcement. (Confidence: medium · ASSESSED)
   • I&W: UKMTO weekly transit figures remain below its stated pre-blockade benchmark. (1-3 months)
   • I&W: UKMTO transit figures reach or exceed that benchmark for two consecutive weeks. (1-3 months)
3. A Houthi attack on a Saudi-affiliated ship at Bab al-Mandab is unlikely over the next 0-14 days, but confidence in this forecast is low. UKMTO reported no Red Sea or Bab al-Mandab attacks in its latest weekly reporting, while the Houthis have stated that Saudi-affiliated ships are excluded from their safe-passage assurance and have been reported to threaten or attack Saudi shipping. Those policy and attack claims do not establish an imminent strike, and the scope of the Houthi screening rules remains disputed. (Confidence: low · ASSESSED)
   • I&W: UKMTO confirms a deliberate attack on a Saudi-affiliated vessel transiting Bab al-Mandab. (0-14 days)
   • I&W: UKMTO reports no attack in the Red Sea or Bab al-Mandab through the end of the forecast period. (0-14 days)

Outlook & scenarios

Selective passage controls continue (60%)

Likely: the Houthis continue receiving passage requests and issuing approvals, while commercial traffic through Bab al-Mandab remains below the stated pre-blockade benchmark. UKMTO continues to report no deliberate attacks in the Red Sea or strait during the period.

A Saudi-linked vessel is attacked (25%)

Unlikely, but this is the main near-term disruption scenario. A Houthi attack on a Saudi-affiliated ship would test the stated Saudi exclusion and prompt operators to reassess passage approvals and routing.

Traffic partially recovers (10%)

A sustained recovery to UKMTO's pre-blockade transit benchmark is unlikely over the next 1-3 months. Continued passage without reported attacks, alongside the Houthis' claimed October crossings, would support this scenario, though the crossing figure remains unverified.

Houthi targeting broadens to other commercial traffic (5%)

Very unlikely, but high impact. If the Houthis extend attacks beyond Saudi-linked vessels, wider avoidance of Bab al-Mandab would be likely and the present selective-screening picture would no longer describe the risk.

Recommendations

1. Keep UKMTO incident reporting for the Red Sea and Bab al-Mandab separate from counts for the Strait of Hormuz and Arabian Gulf. State the geography and reporting period whenever citing an attack tally.
2. Treat a Houthi passage approval as evidence of the group's stated screening process, not as confirmation that a voyage is safe. Check each reported permit against operator and UKMTO reporting before drawing conclusions about vessel risk.
3. Track UKMTO transit counts against its stated pre-blockade benchmark and record confirmed incidents separately from events assessed as spillover from fighting on land.
4. For Saudi-linked shipping assessments, monitor reported Houthi statements, confirmed vessel incidents and actual transit outcomes separately. Do not treat the stated exclusion or the permit system's eligibility rules as settled policy.

Confidence & uncertainty

Overall confidence is high for the broad picture of continued Houthi passage pressure alongside reduced but ongoing traffic. UKMTO provides the principal incident and transit reporting, while major-media accounts citing crew testimony and emails describe the approval process and report a specific permit for a Chinese container ship. Confidence is lower on the approval system's reach and criteria, the claimed October crossing count, and the near-term risk to Saudi-linked ships. UKMTO's reporting also distinguishes the 4 October spillover incident from deliberate attacks.

Intelligence gaps

• [EEI 1.1 · PARTIAL] Incidents of hostile action against commercial vessels: vessel name/IMO, position (lat/long), time/date, observable damage or casualties, and weapon type reported (missile, drone, small-arms, explosive-laden boat). Recommended collection: maritime/AIS
• [EEI 1.3 · PARTIAL] Unusual Houthi force posture indicators along Yemen’s Red Sea coast: movement or concentration of small boats, visible coastal missile/rocket emplacements, or logistics buildup at known launch sites (locations, timestamps). Recommended collection: imagery/satellite
• [EEI 1.4 · PARTIAL] Intercepts or communications indicating orders, targeting lists, or intent to strike merchant shipping (messages referencing specific vessel classes, companies, or chokepoints). Recommended collection: signals/communications
• [EEI 2.1 · UNCOVERED] Reports or visual confirmation of floating or moored mines and debris fields in shipping lanes or approaches to Bab-el-Mandeb, with geolocation and time. Recommended collection: imagery/satellite
• [EEI 2.2 · UNCOVERED] Detection of mine-laying activity: small vessels loitering in lane approaches, unexpected AIS track patterns consistent with mine deployment, or salvage/mining vessels operating in the area. Recommended collection: maritime/AIS
• [EEI 2.4 · UNCOVERED] Naval or commercial reports of mine-countermeasure operations or confirmed mine removal events (location, time, platforms involved). Recommended collection: naval/intelligence
• [EEI 3.1 · PARTIAL] Movements and presence of foreign warships and support vessels: names/classes, task group compositions, patrol areas and timelines, and whether vessels are conducting escort or interdiction operations. Recommended collection: naval/intelligence
• [EEI 3.2 · PARTIAL] Official announcements or directives from states/coalitions regarding convoys, armed escorts, protected corridor establishment, or changes to rules of engagement for merchant protection. Recommended collection: diplomatic/public_affairs
• [EEI 3.3 · UNCOVERED] Recorded interactions between naval forces and vessels in the corridor (hailings, boardings, warnings, defensive strikes), including timestamps and outcomes. Recommended collection: maritime/AIS
• [EEI 3.4 · UNCOVERED] Planned or ongoing multinational exercises, air ISR sorties, or logistics moves that increase or decrease naval capacity in the area (exercise name, participating units, dates, locations). Recommended collection: open-source/military_reporting
• [EEI 4.1 · PARTIAL] Transit volume and pattern changes: number of commercial transits per day/week through Bab-el-Mandeb and southern Red Sea compared with baseline, and instances of rerouting around Africa (position/time data). Recommended collection: maritime/AIS
• [EEI 4.2 · PARTIAL] War-risk and hull insurance coverage changes: issuance refusals, premium increases for Red Sea transits, or explicit route exclusions by underwriters (policy notices or market rate data with dates). Recommended collection: commercial/insurance_data
• [EEI 4.3 · PARTIAL] Freight and charter market signals tied to the corridor: spot rates for container, tanker, and dry bulk routes affected by Red Sea disruptions, and reported port congestion or turnaround-time increases at nearby hubs. Recommended collection: commercial/market_data
• [EEI 4.4 · PARTIAL] Incidents of cargo denial or diversion for critical goods (crude oil, refined products, LNG, high-value container cargo) including vessel IDs, cargo type, reroute/turnback actions, and economic impact estimates where available. Recommended collection: maritime/AIS

Red cell review: CONCUR WITH COMMENT

TLP:CLEAR