How Seafarer Index is built
Measured numbers
Counted by the collection, not written by hand. A figure we cannot support is left out rather than shown as zero.
- Pages
- 22,876
- 1st of 9 measured in Business/Trade, by sitemap URLs
- Page count over time
- 22,881 → 22,876 pages measured, 30 Sep to 25 Oct
- Languages
- English
- Uptime
- 100.00% over 30 days
- From the public status feed
- Deploys
- 16 in the last 30 days
- Last deploy 20 Oct 2026. From the public status feed
- llms.txt
- Published
- llms.txt 32.2 KB · llms-full.txt 679 KB
- Feed
- Published
- Sitemap
- Listed in robots.txt
- Content last updated
- 20 Oct 2026
- As reported by the site itself
Tech and AI search
Read from the live site on 2026-10-23: its homepage, robots.txt and llms.txt. A line we could not read is left out.
- Built with
- Next.js
- Read from the homepage markup
- Structured data
- Organization, WebSite
- schema.org types on the homepage
- AI crawler access
- Allows all 11 major AI crawlers
- From the site’s robots.txt
- llms.txt link depth
- 285 page links
- Markdown links in the site’s llms.txt
- Search
- Search box on the homepage
How it is built, by role
The same roles apply across the whole collection. Nothing in this block is specific to this site; what the site says about itself is quoted word for word below it.
- 1
Edge network
Visitors reach a site through an edge layer: a content delivery network with a web application firewall in front of it.
- 2
Application host
The edge talks to an application host that serves the site and renders its pages.
- 3
Data
What the pages show comes from a relational database or, for a site pre-rendered at build time, from data files built into its release.
- 4
Scheduled measurement
The collection measures its sites on a schedule: content dates and site health nightly, page counts read from each site’s sitemap weekly. Every reading is kept with its date. A site too large to re-walk is not re-measured, and shows no trend.
- 5
Public status feed
A monitoring panel sends a signed report on uptime, deploys and backups once a day, and the Operations page publishes it. A figure on this page that comes from that report says so.
In the site's own words
Each passage is copied unaltered from a page the site publishes, with the address it was taken from and the date we took it. We add nothing between them.
“Seafarer Index is a free, login-optional reference portal for the world's roughly 1.9 million seafarers. Ports, ships, companies, flag states, STCW certificates, maritime terminology, wage scales, seafarer welfare centres, and crisis helplines — each entry gets its own permanent URL you can bookmark, link, or share in a group chat.”
“Data is compiled from public sources (UN/LOCODE, IMO, ILO/MLC, Paris/Tokyo MoU, ITF, Equasis, national maritime authorities, ICMA partners, maritime RSS feeds).”
“Each port page carries UN/LOCODE, coordinates, time zone, nearest airport, and outbound links to MarineTraffic / VesselFinder / OpenStreetMap.”
“All wage data carries a confidence grade (high / medium / low / stale) based on source authority + year.”
“Ranges drawn from ITF Total Crew Cost (TCC) scale + industry wage surveys.”
“Imported data, not user-generated. Content ships with the site from public maritime sources. The forum is a small secondary layer; it is not the primary value.”
“Cited. Every figure links to its source on /sources. Glossary entries cite IMO conventions where applicable.”
“Static-first. Pages prerender at build time; they load in seconds on 0.5 Mbps.”
Screenshots
Timeline
22,881 → 22,876 pages measured, 30 Sep to 25 Oct
| Date | Pages |
|---|---|
| 2026-09-30 | 22,881 |
| 2026-10-10 | 22,874 |
| 2026-10-18 | 22,875 |
| 2026-10-25 | 22,876 |
- 30 Sep 202622,881 pages
- 10 Oct 202622,874 pages
- 18 Oct 202622,875 pages
- 25 Oct 202622,876 pages