When Both Cables Fail: A Resilience Plan for a SEA-ME-WE 4 and 5 Dual-Cut

Diagnosis

The risk in front of us is concrete and named: a simultaneous failure of the SEA-ME-WE 4 and SEA-ME-WE 5 submarine cable systems (the curated trigger in the GovTwin entity record). These two systems are the country's primary undersea connectivity. When one cable is cut, traffic can lean on the other plus terrestrial backup. When both go down at once, whether from a single seismic or anchor-drag event in a shared corridor, a vessel grounding, or coordinated sabotage, the fallback assumed by every contingency plan disappears at the same moment.

This is a short-horizon, latent (tier 2) hazard: it is not unfolding today, but it has no warning runway once it begins, and the cost lands instantly on banking settlement, customs and port systems, mobile financial services, export communications, and government service delivery. The current_state for this indicator is null, which is itself the finding: there is no live, published measure of how much of national traffic actually depends on these two cables versus terrestrial and satellite alternatives. You cannot manage a single-point-of-failure you do not measure. The lead body is the ICT Division (ICTD), per the GovTwin entity registry, with the Bangladesh Computer Council, Bangladesh Hi-Tech Park Authority, and the Ministry of Science and Technology in support.

Recommended actions

1. Stand up a live connectivity-resilience dashboard. Owner: ICT Division, executed by the Bangladesh Computer Council. Mechanism: a standing data feed, mandated by ICTD circular to the international gateway and cable landing operators, reporting real-time capacity carried per submarine system, per terrestrial cross-border route, and per satellite link. Observable signal: the current_state for this hazard moves from null to a published, periodically refreshed share-of-traffic figure that the ICTD can cite under pressure.
2. Mandate a terrestrial and satellite failover reserve. Owner: ICT Division. Mechanism: a licensing condition requiring international gateway operators to hold contracted, pre-tested reserve capacity on terrestrial cross-border routes and on satellite, sized to carry priority national services (banking settlement, customs, emergency communications) during a dual-cut. Observable signal: a documented, tested reserve exists and is exercised, not merely contracted on paper.
3. Define and protect a priority-traffic order. Owner: ICT Division, with the Ministry of Science and Technology. Mechanism: a gazetted continuity protocol that ranks which national services hold connectivity first when total capacity collapses, and pre-authorizes the routing rules to enforce that order. Observable signal: operators can demonstrate the priority routing switches over within a defined target window during a drill.
4. Rehearse the dual-cut as a national exercise. Owner: ICT Division, hosted through the Bangladesh Hi-Tech Park Authority. Mechanism: a scheduled tabletop and live failover drill that simulates both cables down at once, including the banking and customs dependencies. Observable signal: each drill produces a written gap list, and the next drill closes the prior list.
5. Diversify landing-point and route concentration over time. Owner: ICT Division. Mechanism: incorporate route and corridor diversity as a scored requirement in future international connectivity procurement and licensing, so new capacity does not re-concentrate in the same shared failure corridor. Observable signal: new contracted capacity lands and routes through distinct paths from the existing two systems.

Sequencing (first 12 months)

Begin with the dashboard (action 1): it is cheap, fast, and converts the null current_state into a number, which is the precondition for everything else. In parallel, draft the failover-reserve licensing condition and the priority-traffic protocol (actions 2 and 3), because they require legal drafting and operator consultation that take months. Once the reserve and protocol exist on paper, run the first national drill (action 4) to test them; the drill's gap list then feeds the diversification criteria (action 5). The dashboard unlocks the credibility of every later step, because a resilience mandate without a measured baseline is unenforceable.

Risks and constraints

The binding constraints are fiscal and institutional, not technical. Reserve terrestrial and satellite capacity costs money even when idle, and operators will resist holding it without a clear licensing requirement, so ICTD must use its regulatory authority rather than a request. Coordination is the second constraint: banking, customs, and ports sit outside ICTD's direct control, so the priority-traffic protocol succeeds only if the supporting ministries commit in advance. Finally, complacency is the political risk: because the hazard is latent and not yet realized, funding the reserve competes against visible, near-term priorities, and the case must be made before the cut, not after.

Bottom line

A dual-cut of SEA-ME-WE 4 and 5 turns a manageable single-cable incident into a national connectivity outage, and Bangladesh currently has no measured view of how exposed it is. The ICT Division should measure the dependency first, mandate and rehearse a reserve, and pre-authorize a priority order, so the fallback exists before both cables ever fail at once.