IMO 9290505
The vessel BASILIS L was selected as Vessel Spotlight, ranked #16 of 3,326 monitored vessels, with key metrics over the past 90 days including 46 STS proximity events, 3 AIS gaps, 112 loitering events, and 160 zone dwell events. The top operating zones included the Eastern Mediterranean Surveillance Zone with 330 events, followed by the South Aegean Monitoring Zone, Southern Black Sea Sanctioned Vessel Zone, North Sea Monitoring Zone, and North Sea Surveillance Zone. The vessel was detected in the vicinity of terminal zones, but no direct terminal visits were recorded during this period. These metrics are based on AIS-derived behavioral indicators.
Vessel information
Movement & AIS Track
The vessel BASILIS L was detected in the Eastern Mediterranean Surveillance Zone most frequently, with a total of 330 events, including 126 zone dwell events, 112 loiter events, and 92 STS proximity detections. Additionally, the vessel was detected in the South Aegean Monitoring Zone (8 events) and the Southern Black Sea Sanctioned Vessel Zone (8 events), both primarily consisting of zone dwell events. The vessel was detected in the vicinity of terminal zones, though no direct terminal visits were recorded during this period.
| Zone | Events | Types | First Seen | Last Seen |
|---|---|---|---|---|
| Eastern Mediterranean Surveillance Zone | 330 | zone_dwell: 126, loiter: 112, sts: 92 | Jul 7, 2026 | Aug 27, 2026 |
| South Aegean Monitoring Zone | 8 | zone_dwell: 8 | Aug 1, 2026 | Aug 1, 2026 |
| Southern Black Sea Sanctioned Vessel Zone | 8 | zone_dwell: 7, ais_gap: 1 | Jun 9, 2026 | Aug 1, 2026 |
| North Sea Monitoring Zone | 7 | zone_dwell: 7 | Jul 14, 2026 | Jul 31, 2026 |
| North Sea Surveillance Zone | 4 | zone_dwell: 4 | Jun 13, 2026 | Jun 13, 2026 |
| Black Sea Sanctioned Vessel Monitoring Zone | 4 | zone_dwell: 3, ais_gap: 1 | Feb 24, 2026 | Feb 24, 2026 |
| Central Mediterranean Surveillance Zone | 3 | zone_dwell: 2, sts: 1 | Jul 1, 2026 | Jul 4, 2026 |
| Istanbul Black Sea Surveillance Zone | 3 | zone_dwell: 3 | Jun 11, 2026 | Jun 11, 2026 |
| North Jutland Monitoring Zone | 3 | zone_dwell: 3 | Mar 7, 2026 | Mar 14, 2026 |
| Eastern Mediterranean Surveillance Zone | 2 | zone_dwell: 2 | Jun 7, 2026 | Jun 8, 2026 |
| Eastern Mediterranean Monitoring Zone | 2 | zone_dwell: 2 | Feb 7, 2026 | Feb 7, 2026 |
| Eastern Mediterranean Monitoring Zone | 1 | zone_dwell: 1 | Jul 28, 2026 | Jul 28, 2026 |
| discovered_107 | 1 | ais_gap: 1 | Jun 19, 2026 | Jun 19, 2026 |
| Western Approaches Surveillance Zone | 1 | ais_gap: 1 | Jun 19, 2026 | Jun 19, 2026 |
| discovered_183 | 1 | ais_gap: 1 | Feb 14, 2026 | Feb 14, 2026 |
STS Proximity Partners
The vessel BASILIS L recorded 46 STS proximity detections involving 7 distinct partner vessels. The most frequent partners detected in proximity were BASILIS L itself, STI MIGHTY, and SARIYAH, with 49, 15, and 14 proximity events, respectively. None of the partner vessels were identified as sanctioned.
Ownership & Management
CAUPOLA SHIPPING LTD appears to be a Greece-based ship management company associated with Leon Shipping & Trading SA in Athens. Public maritime directory data indicates it manages a single vessel and is linked to the tanker BASILIS L.
⚠ Red Flags
- Very limited public footprint beyond vessel-management listings
- Uses a shared ship-management office address
- Beneficial ownership not clearly disclosed in the available public records
LEON SHIPPING & TRADING SA is a Greek ship management company based in Athens, described as a commercial ship manager and ISM manager. It states that it was established in July 2010 and focuses on tanker-market ship management.
Tsakos Shipping & Trading S.A. is a Greek maritime company based in Athens and part of the Tsakos Group of Companies. Public sources describe it as a ship manager and commercial manager for a large tanker fleet, with operations tied to the group’s integrated shipping activities.[2][3][12][15]
⚠ Red Flags
- No direct red flags identified in the gathered sources
- Shared group office address used across Tsakos entities
- Fleet size not independently verified in the available sources
Name, Flag & Ownership History
- Jul 1, 2017BASILIS L
- Dec 1, 2006Mare Ambassador
- Sep 1, 2005Baltic Ambassador
- Dec 1, 2006🇲🇭 Marshall Islands
- Dec 1, 2006🇩🇪 Germany
- Sep 1, 2005🇨🇾 Cyprus
| Date | Company | Role |
|---|---|---|
| Aug 9, 2024 | LEON SHIPPING & TRADING SA | ISM Manager |
| Oct 21, 2022 | TSAKOS CONBULK SERVICES TCB | ISM Manager |
| Oct 21, 2022 | TSAKOS SHIPPING & TRADING SA | Ship manager/Commercial manager |
| Mar 21, 2019 | TSAKOS COLUMBIA SHIPMGMT-PAN | ISM Manager |
| Jul 27, 2017 | TSAKOS COLUMBIA SHIPMGMT-PAN | Ship manager/Commercial manager |
| Jul 27, 2017 | CAUPOLA SHIPPING LTD | Registered owner |
| May 28, 2008 | COLUMBIA SHIPMANAGEMENT-GEU | Ship manager/Commercial manager |
| May 28, 2008 | COLUMBIA SHIPMANAGEMENT-GEU | ISM Manager |
| Dec 20, 2006 | INTERORIENT MARINE SERVICES | Ship manager/Commercial manager |
| Dec 20, 2006 | INTERORIENT MARINE SERVICES | ISM Manager |
| Sep 15, 2005 | INTERORIENT NAVIGATION CO LTD | ISM Manager |
| Sep 14, 2005 | INTERORIENT NAVIGATION CO LTD | Ship manager/Commercial manager |
Classification & Safety
Disclaimer
This vessel profile is compiled from publicly available information sources including maritime databases, government sanctions lists, and AIS position data. Information may be incomplete, delayed, or contain inaccuracies.
This content is for informational purposes only and does not constitute legal, financial, or compliance advice. FleetLeaks makes no warranties regarding the accuracy or completeness of the information presented. Users should independently verify all information before making decisions.
Data Scope & Currency
This dossier reflects automated analysis of publicly available data sources as of August 29, 2026 (UTC). FleetLeaks does not assert intent or wrongdoing. Observations are derived from AIS behavioral signals, registry records, and other open sources, each subject to inherent latency and reporting limitations.
Data Refresh
This dossier can be re-generated using the same automated pipeline with the most current available data. A refresh re-executes the standard selection, enrichment, and analysis process and does not alter methodology or thresholds. To request a refreshed version of this dossier, please contact us. A nominal fee may apply to cover compute and data access costs.
Generated: 2026-08-29T10:04:55.798245Z