CM Group — Barge Tracking Dashboard

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Ocean-goingⓘ Shuttle Vesselⓘ Bargeⓘ

Mine Share (% of eligible movements)

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Guinea Bauxite Export — Overview

All Guinea

Boké (Kamsar)

Boffa

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Snapshot of this week

This Week Departed

—Mt

WoW—

vs 4-wk avg—

Arrivals This Week

number of vessels

—vessels

WoW—

vs 4-wk avg—

In-Port Capacity

—Mt

Vessels—

Snapshotlive

Vessels In Port

—ships

Statusberthed / anchored

Snapshotlive

Week-over-Week

—%

This wk—

Last wk—

Weekly Departing DWT by Corridor (Mt)

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Guinea Barge Activity Index (GBAI) by Corridorⓘ

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Map type

Dark map Satellite map

Avg Loading Time by Mine (min) — loading trends & mine breakdown

Nanshan — 4-Week Rolling Average (Arrival / Departure DWT)

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28-day (4-week) rolling average of daily arrival / departure DWT. Filter: BULK CARRIER, DWT > 10,000t.

Loading events

—

last 30 days

Est. capacity

—

DWT (full-load proxy)

Barge cycles

—

— transshipped

Ocean carriers served

—

from transship

Morébaya (Simandou) — Daily Loading Activity

Loading events = a vessel dwelling in the Morébaya iron-ore zone (≥3h, ≤0.5kn). Bars = estimated capacity (sum of vessels' DWT — a full-load proxy, not measured tonnage); line = number of vessels.

Loading Events

Vessel	Start	End	Dwell (h)	Est. Capacity (DWT)

Barge Cycles — load → drop → transship — each row = one barge trip; click to draw its route

Barge	Loaded (iron ore)	Dropped	Destination

Barge loads at the Simandou iron-ore circle, sails ~40 km west, and drops. Destination = ocean carrier it went alongside (transship), or shore/terminal if no carrier nearby.

Table	Area	Coverage	Schedule
boffa_barge_index_v2	Wharf/Mine (LAT 10.00–10.20)	~6,000 records/day	08:15 UTC
boffa_test	Anchorage (LAT 9.58–10.00)	~16,000 records/day	08:30 UTC
vessel_particular	Ship info (DWT, type)	Static	Auto-updated

Table

Area

Coverage

Schedule

boffa_barge_index_v2

Wharf/Mine (LAT 10.00–10.20)

~6,000 records/day

08:15 UTC

boffa_test

Anchorage (LAT 9.58–10.00)

~16,000 records/day

08:30 UTC

vessel_particular

Ship info (DWT, type)

Static

Auto-updated

Step	Action	Rule
A	Data Collection	Merge both tables by MMSI
B	Vessel Filter	DWT < 10,000 + valid MMSI + ≥3 points/day
C	Trajectory Cleaning	Remove points where consecutive distance > 15km
D	Zone Assignment	Each point → Wharf / Anchorage / Transit
E	Segment Building	Group consecutive same-zone points
F	Pattern Detection	Find Wharf → Anchorage → Wharf sequence

Step

Action

Rule

Data Collection

Merge both tables by MMSI

Vessel Filter

DWT < 10,000 + valid MMSI + ≥3 points/day

Trajectory Cleaning

Remove points where consecutive distance > 15km

Zone Assignment

Each point → Wharf / Anchorage / Transit

Segment Building

Group consecutive same-zone points

Pattern Detection

Find Wharf → Anchorage → Wharf sequence

#	Filter	Threshold	Eliminates
F1	Complete Trip	Wharf → Anchorage → Wharf in time order	Incomplete journeys
F2	Anchorage Confirmation	≥2 AIS points, ≥15 min apart	AIS glitches
F3	Penetration Depth	≥1.5 km into anchorage	Boundary drift
F4	Movement Speed	Max speed > 2 kn during trip	Stationary noise
F5	Dwell Time	15 min – 24 hours in anchorage	Pass-throughs & overnighters
F6	Deduplication	Same barge ≥3h gap between movements	Double-counting
F7	Vessel Type	DWT < 10,000 or unknown	Bulk carriers
F8	Data Quality	Valid MMSI + ≥3 points/day	Garbage data

Filter

Threshold

Eliminates

Complete Trip

Wharf → Anchorage → Wharf in time order

Incomplete journeys

Anchorage Confirmation

≥2 AIS points, ≥15 min apart

AIS glitches

Penetration Depth

≥1.5 km into anchorage

Boundary drift

Movement Speed

Max speed > 2 kn during trip

Stationary noise

Dwell Time

15 min – 24 hours in anchorage

Pass-throughs & overnighters

Deduplication

Same barge ≥3h gap between movements

Double-counting

Vessel Type

DWT < 10,000 or unknown

Bulk carriers

Data Quality

Valid MMSI + ≥3 points/day

Garbage data

#	Enhancement	Rule	Source
R1	Trajectory Continuity	Remove points >15km from previous	Wijaya 2024
R2	Stopping Detection	SOG ≤ 0.4 kn = stopped	Wijaya 2024 + IMF
R3	Min Trip Duration	Total round-trip ≥ 30 min	UNCTAD
R4	Heading Variation	Anchored vessel heading varies >5° avg	Wijaya 2024

Enhancement

Rule

Source

Trajectory Continuity

Remove points >15km from previous

Wijaya 2024

Stopping Detection

SOG ≤ 0.4 kn = stopped

Wijaya 2024 + IMF

Min Trip Duration

Total round-trip ≥ 30 min

UNCTAD

Heading Variation

Anchored vessel heading varies >5° avg

Wijaya 2024

Signal	Meaning
Movements ↑	More active loading → expect bulk departures in 1–5 days
Movements ↓	Loading slowdown → weather / strike / no ships
High dwell time	Congestion → barges waiting longer
Low dwell time	Quick transfers → efficient operations
Many unique barges	Full fleet deployed
Few barges, many trips	Same barges doing multiple runs

Signal

Meaning

Movements ↑

More active loading → expect bulk departures in 1–5 days

Movements ↓

Loading slowdown → weather / strike / no ships

High dwell time

Congestion → barges waiting longer

Low dwell time

Quick transfers → efficient operations

Many unique barges

Full fleet deployed

Few barges, many trips

Same barges doing multiple runs

Zone	MINLAT	MAXLAT	MINLON	MAXLON
Wharf (boffa_barge_index_v2)	10.0048	10.2000	-14.1060	-14.0090
Anchorage (boffa_test / New Boffa)	9.5819	10.0048	-14.4786	-14.0001

Zone

MINLAT

MAXLAT

MINLON

MAXLON

Wharf (boffa_barge_index_v2)

10.0048

10.2000

-14.1060

-14.0090

Anchorage (boffa_test / New Boffa)

9.5819

10.0048

-14.4786

-14.0001

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Guinea Bauxite Export — Overview

Voyage Watchlist

Map type

Map type

Vessel filters

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Guinea Bauxite Export — Overview

Voyage Watchlist

Map type

Barge Index — Algorithm Logic

Data Sources

Eligible Movement Definition

Algorithm Pipeline

Quality Filters (8)

Research Enhancements (4)

Outbound Trips (V2)

Interpretation

Zone Coverage

Vessel Track