#280 GRATEFUL DAD // Vessel Intelligence System

Intelligence Overview

GRATEFUL DAD · MMSI 338211904 · 🇺🇸 US · Primary Port: Boston

PERIOD: JAN–DEC 2024

⚠ INTELLIGENCE ASSESSMENT: GRATEFUL DAD ranks #280 of 69,461 monitored vessels with 76 anomalous detections across 7 months. Composite risk score: 0.9500 (CRITICAL). Active alert types: SPEED_ANOMALY, POSITION_JUMP, ZIGZAG.

Global Rank

#280

of 69,461 vessels

Composite Score

0.9500

CRITICAL

Total Detections

76

Months Active

7/12

Unique Ports

2

Position Jumps

1

GPS spoofing

Speed Anomalies

1

Max Speed

45.5 kn

Max Jump

486km

Monthly Detection Volume

10
5

11
1

2024 MONTHLY DETECTIONS

Alert Type Distribution

ZIGZAG

4

POSITION_JUMP

1

SPEED_ANOMALY

1

Key Intelligence Findings

GPS Spoofing — 1 Position Jumps

AIS coordinates fabricated at impossible locations. Maximum jump of 486 km confirms the AIS transmitter is broadcasting false positions. Systematic identity concealment is in progress.

Velocity Fraud — 1 Speed Anomaly Events

AIS SOG field manipulated to broadcast physically impossible speeds up to 45.5 knots. Systematic falsification of movement data to corrupt automated tracking algorithms.

Evasion Navigation — 4 Zigzag Events

Erratic course-over-ground patterns up to 115.7° std deviation, far exceeding the 50° anomaly threshold. Pattern consistent with surveillance evasion maneuvers.

Port Detection Summary

🇺🇸

Boston

3

avg 0.811

🇺🇸

New York

3

avg 0.741

Monthly Alert Log — All Months

Month	Detections	Severity	Score	Nearest Port	Alert Types
May 2024	9	CRITICAL	0.9346	Boston	POSITION_JUMP; SPEED_ANOMALY; ZIGZAG
June 2024	14	CRITICAL	0.9309	Boston	SPEED_ANOMALY; POSITION_JUMP; ZIGZAG
July 2024	19	CRITICAL	0.9162	Boston	SPEED_ANOMALY; POSITION_JUMP; ZIGZAG
August 2024	15	CRITICAL	0.9275	Portland ME	POSITION_JUMP; SPEED_ANOMALY; ZIGZAG
September 2024	13	CRITICAL	0.9500	Boston	POSITION_JUMP; SPEED_ANOMALY; ZIGZAG
October 2024	5	HIGH	0.8962	Boston	POSITION_JUMP; SPEED_ANOMALY; ZIGZAG
November 2024	1	MEDIUM	0.7495	New York	ZIGZAG

Activity Map

Detection events plotted · Color-coded by alert type · Drag to pan · Scroll to zoom

● Speed Anomaly ● Position Jump ● Zigzag ● Dark Vessel ● Rendezvous

Threat Intelligence

Analytical confidence: HIGH · Multi-indicator assessment

Threat Indicators Matrix

Indicator	Status	Evidence	Confidence
AIS Blackout / Dark Vessel	NOT DETECTED	—	LOW
GPS Spoofing / Position Jump	CONFIRMED	1 jumps · max 485.5km	CRITICAL
Velocity Fraud / Speed Anomaly	CONFIRMED	1 events · max 45.5 kn	CRITICAL
Evasion Navigation / Zigzag	CONFIRMED	4 events · max COG std 115.7°	HIGH
Ship-to-Ship Rendezvous	NOT DETECTED	—	LOW
Multi-Port Operations	POSSIBLE	2 unique ports	MEDIUM

Operational Profile

Primary AO

Boston and surrounding maritime zone

Active Period

7 months of continuous alert activity in 2024

Alert Density

76 detections across 6 individual events (avg 10.9/month)

Active Techniques

⚡ SPEED ⊕ POS JUMP ⟳ ZIGZAG

Threat Category

High-Confidence AIS Manipulation — Multiple confirmed evasion techniques

TTP Analysis

Tactics, Techniques & Procedures — Maritime ATT&CK Framework

MAR-T003

RTE-ANO-005

Evasion Navigation

Erratic COG changes exceeding 50° threshold (max 115.7°). Consistent with surveillance evasion or at-anchor AIS manipulation. Count: 4 events.

HIGH CONFIDENCE
4 events

MAR-T002

AIS-MAN-003

GPS Spoofing

GPS coordinate spoofing — AIS positions fabricated at impossible locations. Max jump: 485.5km. Implies deliberate identity concealment. Count: 1 events.

HIGH CONFIDENCE
1 events

MAR-T001

RTE-ANO-001

Velocity Fraud

AIS SOG field manipulation to broadcast impossible speeds up to 45.5 kn. Corrupts automated tracking algorithms and creates false movement vectors. Count: 1 events.

HIGH CONFIDENCE
1 events

Risk Analysis

Composite risk scoring · Weighted indicator model · Quantus v2.4

Composite Score

0.9500

CRITICAL

Avg Detection Score

0.9007

Global Rank

#280

of 69,461 vessels

Weighted Indicator Scoring

Formula: (Dark×3) + (Rendezvous×4) + (PosJump×2) + (Speed×1) + (Zigzag×0.5) + (MaxScore×50)

Indicator	Count	Weight	Contribution
DARK_VESSEL	0	×3	0.0
RENDEZVOUS	0	×4	0.0
POSITION_JUMP	1	×2	2.0
SPEED_ANOMALY	1	×1	1.0
ZIGZAG	4	×0.5	2.0
MaxSingleScore	0.9500	×50	47.5
COMPOSITE TOTAL	Normalized [0,1]		0.9500 CRITICAL

⚡ Speed Anomaly Detections

Indicator: RTE-ANO-001 · 1 events · Max: 45.5 kn

AIS SOG FRAUD

Speed anomaly events are triggered when AIS Speed Over Ground (SOG) exceeds the 30-knot detection threshold. GRATEFUL DAD reports speeds up to 45.5 kn — consistent with deliberate AIS SOG field manipulation to corrupt tracking algorithms.

Total Events

1

Max Reported SOG

45.5 kn

Indicator ID

RTE-ANO-001

Speed Anomaly Events (Top 50 by score)

Date	Max SOG (kn)	Score	Severity	Port	Coordinates

⊕ Position Jump Detections

Indicator: AIS-MAN-003 · 1 events · Max jump: 486 km

GPS SPOOFING

Position jumps confirm GPS coordinate spoofing — AIS positions fabricated at impossible locations. GRATEFUL DAD has 1 confirmed position jumps with maximum displacement of 486 km.

Total Events

1

Max Jump Distance

486 km

Indicator ID

AIS-MAN-003

Position Jump Events (Top 50 by distance)

Date	Jump (km)	Implied Speed (kn)	Score	Severity	Spoofed-To Port	Coordinates

⟳ Zigzag / Erratic Navigation

Indicator: RTE-ANO-005 · 4 events · Max COG std: 115.7°

EVASION PATTERN

Zigzag events are triggered when course-over-ground (COG) standard deviation exceeds 50°. GRATEFUL DAD records COG deviations up to 115.7° — consistent with surveillance evasion maneuvers or at-anchor AIS noise manipulation.

Total Events

4

Max COG Std Dev

115.7°

Threshold

50°

Zigzag Events (Top 50 by COG deviation)

Date	COG Std Dev (°)	Score	Severity	Port	Coordinates

Port History

2 distinct port areas · US primary flag state

Complete Port Detection Summary

Port	Country	Detections	Avg Score	Avg Dist NM	Risk
Boston	🇺🇸	3	0.8107	133.8	STANDARD
New York	🇺🇸	3	0.7406	18.1	STANDARD

🇺🇸 Boston — Port Profile

3 detections · Avg score 0.8107 · Avg distance 133.8 NM

LOW RISK

Total Detections

3

Primary port of operation

Avg Alert Score

0.8107

Avg Distance NM

133.8

Port proximity zone

Detection Types at Boston

POSITION_JUMP

1

SPEED_ANOMALY

1

ZIGZAG

1

Coordinates: 42.358°N, 71.051°W

Port Intelligence Notes

Port Country

🇺🇸 US

Risk Classification

LOW — Standard port monitoring applies

Detection Share

3 of 6 total detections (50.0%)

Avg Distance from Port

133.8 NM — consistent with port proximity operations

🇺🇸 New York — Port Profile

3 detections · Avg score 0.7406 · Avg distance 18.1 NM

LOW RISK

Total Detections

3

Primary port of operation

Avg Alert Score

0.7406

Avg Distance NM

18.1

Port proximity zone

Detection Types at New York

ZIGZAG

3

Coordinates: 40.661°N, 74.044°W

Port Intelligence Notes

Port Country

🇺🇸 US

Risk Classification

LOW — Standard port monitoring applies

Detection Share

3 of 6 total detections (50.0%)

Avg Distance from Port

18.1 NM — consistent with port proximity operations

Ownership Intelligence

MMSI registry · Flag state analysis · Beneficial ownership investigation

Vessel Name

GRATEFUL DAD

MMSI

338211904

Flag State (MMSI-derived)

🇺🇸 US

MID Code

338 → 🇺🇸 US

Primary Port

Boston

Detection Period

7 months (2024)

Registered Owner

Pending registry lookup

Beneficial Owner

Requires FinCEN CDD query

OFAC SDN Status

Pending cross-reference

Recommended Action

Physical inspection + full registry query

Vessel Type Analysis

AIS declared type · Physical capability vs. observed behavior

Type Mismatch Assessment

AIS Declared Type

vessel_type=37 (Pleasure Craft)

Behavior Consistency

Requires investigation

Speed Capability

Reported 45.5 kn — physically impossible for Type 37 (max ~45 kn high-performance)

Inspection Priority

HIGH — Recommend USCG/CBSA physical boarding and documentation review

Applicable Statutes

47 C.F.R. § 80.953 (AIS falsification) · 33 C.F.R. § 164.46 (AIS carriage) · 21 U.S.C. § 955 (maritime drug law)