Fishing vessel · Flag US
DEFENDER
DEFENDER is a fishing vessel (IMO 8516861, MMSI 303303000, flag US). Its last AIS position was reported on 16 Oct 2026 at 18:40 UTC in Port of Seattle, bound for SEATTLE PIER 90.
Last position
Status: Moored · Destination as broadcast: SEATTLE PIER 90 · ETA as broadcast: 4 Dec 2026, 12:00 UTC
Position of MMSI 303303000, rounded to 0.01°; see the exact live position and the last 3 days on the live map.
Vessel details
| Name | DEFENDER |
|---|---|
| IMO number | 8516861 |
| MMSI | 303303000 |
| Call sign | WDB7740 |
| Type | Fishing vessel |
| Flag | US (from the MMSI country code) |
| Length × beam | 41 m × 9 m |
| Highest reported draught | 6.0 m (last 30 days) |
| Estimated deadweight | ≈ 465 t — estimated from AIS dimensions |
| Destination as broadcast | SEATTLE PIER 90 |
| Seen in AIS | 10 Oct 2026 – 16 Oct 2026 (last 30 days) |
Port calls
No port calls detected in the last 60 days.
DEFENDER in the API
The full track, every port call and the live position of DEFENDER are available through the AIS Trail API. A free key covers the last 7 days of history; paid plans cover the last 12 months, and Pro and Business add live positions.
curl -H "Authorization: Bearer $AIS_TRAIL_KEY" \
"https://api.aistrail.com/v1/vessels/imo/8516861/track?from=2026-10-10&resolution=1h"
curl -H "Authorization: Bearer $AIS_TRAIL_KEY" \
"https://api.aistrail.com/v1/vessels/imo/8516861/port-calls?from=2026-10-10"Sources
- Live AIS via aisstream.io, provided without warranty. No published terms
- Open Waters AIS (https://openwaters.io/ais/), with each event's own source credit (mostly AISHub (https://www.aishub.net) and aisstream.io). Per-event source licence; not merged
Flags come from the MMSI country code, deadweight and size class are estimates from AIS dimensions, port calls are detected by AIS Trail from position reports. All sources and licences: Data sources.
Not for navigation. AIS data can be missing, delayed or wrong; do not use it for navigation, collision avoidance, search and rescue or any other safety-of-life purpose.
