Incident report · 2026090509
Bosun: 1.73× baseline latency
Resolved · 6d 11h
What we measured
| Cable | Bosun |
| Segment | Sydney, AU → Flying Fish Cove, CX |
| Detected | 2026-09-05 16:32 UTC |
| Resolved | 2026-09-12 04:03 UTC |
| Duration | 6d 11h |
| Observed latency | 199.8 ms |
| Baseline | 115.4 ms · 1.73× |
| Increase | +125% |
| Severity | warning |
Who is affected
Countries where Bosun comes ashore, how much of their submarine diversity this cable represents, and what our measurements into them show.
| Country | Dependence on this cable | Other submarine cables | What the measurements show |
|---|---|---|---|
| Australia resilience index: 100 · resilient |
1 of 34 cables (3% of submarine diversity) | APX East, Asia Connect Cable-1 (ACC-1), Australia-Japan Cable (AJC) +30 more | median 331 ms today vs 305 ms over 30 days (43 routes) - unchanged |
| Christmas Island resilience index: 41 · vulnerable |
1 of 4 cables (25% of submarine diversity) | Australia-Singapore Cable (ASC), Dhivaru, TalayLink | average 317 ms over the last day vs 269 ms over 30 days - slower |
Dependence is structural (share of the country's submarine cables), not a traffic share: real traffic distribution across cables is not public.
Timeline
- Alert 2026090509: warning - ratio 2.25x
- Alert #195 improving: 1/3 consecutive OK
- Alert #195 improving: 1/3 consecutive OK
- Alert #195 improving: 2/3 consecutive OK
- Alert #195 resolved: RTT 199.78ms (baseline 115.37ms), 6 consecutive OK
Detection method
Latency is sampled continuously from our probe network. An alert opens when round-trip time to a monitored endpoint holds above its rolling baseline, and closes automatically once it returns. Full method is described on the methodology page.
How to cite
GeoCables (2026). Incident 2026090509: Bosun. https://geocables.com/incident/2026090509
Embed this map
<iframe src="https://geocables.com/embed.php?type=map&id=bosun" width="640" height="420" frameborder="0" loading="lazy" style="border:0;border-radius:10px"></iframe>