STENA IMPERATOR — Know Your Vessel

Updated: 2026-08-03 | Source: ship.rootz.global | Data: OFAC, EIA, EU MRV, GFW, AIS, USCG
Flag State
UNITED KINGDOM
Type
Chemical tanker
Built
2017
9 years old
DWT
25,000

Present Location

Last seen at
ULSAN
KOR
Arrived
2026-07-23
Departed
2026-07-26
8d ago

Risk Assessment

Carbon Intensity (CII)

Rating (2023)
Unrated
CO2 Emissions
5,620
tonnes/year
Distance
19,880
nm/year
YearRatingRatio
2023Unrated
2022Unrated
2021Unrated
2020Unrated
2019Unrated
2018Unrated

EU MRV 2024: 3,287 t CO2, 1,050 t fuel

Voyage Pattern

Port Visits
84
Avg Dwell
194h
8d per port
Port Utilization
48%
time in port

Primary route: SELBY → ULSAN → SAUSALITO

Data period: 2022-09-08 to 2026-07-26

PortCountryVisits
SELBYUSA9
ULSANKOR7
SAUSALITOUSA6
SHANGHAICHN4
TELOK RAMUNIAMYS3

Recent port calls:

ArrivalDeparturePortCountryDuration
2026-07-232026-07-26ULSANKOR2.9d
2026-07-162026-07-20KOR3.3d
2026-07-162026-07-16KOR0.3d
2026-06-242026-06-28SELBYUSA4.2d
2026-06-122026-06-12PANAMA CANAL ANCHORAGEPAN0.3d
2026-06-112026-06-12MANZANILLOPAN0.8d
2026-06-032026-06-06HOUSTONUSA3.1d
2026-05-302026-06-03USA3.8d
2026-05-252026-05-25GATUN LAKE ANCHORAGEPAN0.2d
2026-05-232026-05-25BALBOAPAN2d
2026-05-162026-05-21NIC4.9d
2026-05-122026-05-15ACAJUTLASLV2.8d
2026-05-112026-05-12GTM1.5d
2026-05-072026-05-08PANAMA CANAL ANCHORAGEPAN0.3d
2026-05-072026-05-07MANZANILLOPAN0.2d
2026-04-302026-05-02USA-1152USA2.4d
2026-04-282026-04-29USA1.3d
2026-04-232026-04-24GATUN LAKE ANCHORAGEPAN0.4d
2026-04-222026-04-23BALBOAPAN0.9d
2026-04-072026-04-09USA2.4d

Loitering Events

60 events, 1212 hours total (stationary at sea — possible STS transfers)

StartHoursPositionSpeedRisk Zone
2026-06-23337.4, -123.10.6 kn
2026-03-04235.5, 129.91.6 knHIGH RISK
2026-03-03535.3, 129.81.5 knHIGH RISK
2026-03-03535.3, 129.91.4 knHIGH RISK
2026-03-03835.2, 129.91.2 knHIGH RISK
2026-01-12447.4, 179.00.9 kn
2025-11-05337.4, -125.00.6 kn
2025-10-3013637.5, -126.31.0 kn
2025-10-284437.1, -126.21.2 kn
2025-10-271636.8, -125.41.1 kn

STS Encounter Detection

Other vessels detected loitering at the same position and time (within ~30nm, overlapping window)

2026-03-04 — 35.5, 129.9

VesselIMOStatusDurationSpeed
NEW CONSTANT9708514Clean3h1.5 kn
BOW PLATINUM9777383Clean9h1.2 kn

2026-03-03 — 35.3, 129.8

VesselIMOStatusDurationSpeed
CHALLENGE PRELUDE9333278Clean9h0.9 kn
SINAR MALAHAYATI9349643Clean7h0.8 kn
LEO MARIS9381823Clean9h1.7 kn
HELLAS APHRODITE9722766Clean2h1.3 kn

2026-03-03 — 35.3, 129.9

VesselIMOStatusDurationSpeed
CHALLENGE PRELUDE9333278Clean7h1.7 kn
HAFNIA PANTHER9694464Clean1h1.3 kn
HELLAS APHRODITE9722766Clean2h1.9 kn

2026-03-03 — 35.2, 129.9

VesselIMOStatusDurationSpeed
CHALLENGE PRELUDE9333278Clean6h1.6 kn
CHALLENGE PRELUDE9333278Clean7h1.7 kn
LEO MARIS9381823Clean9h1.7 kn
HAFNIA PANTHER9694464Clean2h1.8 kn
NAVIGATOR CENTAURI9704506Clean1h1.4 kn
NAVIGATOR CENTAURI9704506Clean27h1.1 kn
FAIRCHEM SUCCESS9758090Clean2h1.1 kn

2024-11-02 — 36.8, -123.6

VesselIMOStatusDurationSpeed
TAVISTOCK SQUARE9784001Clean6h1.4 kn

2024-08-26 — 31.2, 122.6

VesselIMOStatusDurationSpeed
VIOLET19154000SANCTIONED226h0.1 kn
MAERSK CALLAO9786152Clean672h0.1 kn
CHEMROAD AQUA9790610Clean22h0.1 kn

2024-07-24 — 37.1, -123.1

VesselIMOStatusDurationSpeed
SIGMA TRIUMPH9410650Clean14h1.3 kn

14 unique vessels encountered, 1 sanctioned

USCG Registration

StatusActive
Call SignMAZS9
Deficiency Count0
Detention Count0
Last Exam

Data sources: USCG CGMIX, EU MRV (EMSA), CII computed, Global Fishing Watch. All records cryptographically attested on Polygon.

Data sources: U.S. Treasury (OFAC SDN), U.S. Energy Information Administration, European Maritime Safety Agency (EU MRV), U.S. Coast Guard (PSIX), Global Fishing Watch (GFW satellite AIS), AISStream.io. All data cryptographically attested on Polygon blockchain.

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