Port Authority open vessel-delay data
📌 TL;DR / Quick Summary <div style="background: rgba(0,0,0,0.3); border: 1px dashed rgba(255,255,255,0.2); padding: 15px; border-radius: 8px; color: rgba(255,255,255,0.7); margin-bottom: 30px;"> The open dataset behind 📌 Statistics II - Project - What predicts vessel delay at Greywater: fourteen months of vessel calls published by 🏢 Port Vellan Port Authority. Fictional, like the port. One row per call. Fields, units, and the two columns that mean nearly the same thing and are not the same thing. </div>
🛠️ Instructions / Core Material
| Column | Unit | Meaning | Trap |
|---|---|---|---|
call_id |
none | One vessel call | A few appear twice, once per berth |
vessel_type |
category | Container, bulk, general, tanker | Gen. cargo and general are one type |
length_m |
metres | Vessel length | Clean |
gross_tonnage |
tonnes | Size | Moves with length; do not use both |
scheduled_arrival |
date and time | Planned arrival | Three date formats |
actual_arrival |
date and time | Arrival at the pilot station | Same three |
berth_time |
date and time | Alongside | Sometimes before arrival, which is impossible |
arrival_delay_h |
hours | actual_arrival minus scheduled_arrival |
Negative means early |
berth_delay_h |
hours | Wait between arrival and berth | Not the same as the one above |
terminal |
category | Which terminal | Greywater is about half the rows |
wind_class |
0 to 4 | Wind on the day | Recorded once a day, at 06:00 |
The three date formats are day first, month first, and one summer stretch where somebody typed the month as a word. Port delay analysis script opens with a function that does nothing but admit this.
⚠️ Key Warnings / Constraints
arrival_delay_his the ship being late.berth_delay_his the port being full. They move together most weeks and mean different things. The project question is about the first one, and I had to say so on slide two.- Rows where the vessel berths before it arrives are dropped, counted, and the count is in the appendix.
- Fourteen months, one port. Whatever it shows, it shows for here.
- The file is open and has no people in it. It is still a colleague of Hana Kobayashi's who maintains it, so the report is polite about the dates.
🔗 Related Entities & Resources
- 📌 Statistics II - Project - What predicts vessel delay at Greywater: the course project that uses this file
- 🏢 Port Vellan Port Authority: the publisher of the dataset
- Port delay analysis script: the notebook that cleans the dates and fits the model