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navcen.uscg.gov/

USCG NAVCEN Maritime Safety Information

Freeauth: noneCustom#osint#maritime#notices-to-mariners#port-status#gps✓ verified Nov 5, 2026

USCG NAVCEN Maritime Safety Information

The U.S. Coast Guard Navigation Center (NAVCEN) publishes Marine Safety Information Bulletins (national-level MSIBs from Headquarters and district/sector MSIBs for local safety zones, waterway restrictions, marine events, hazards and enforcement guidance), Broadcast Notices to Mariners, weekly Local Notices to Mariners (PDF only), Light Lists, Maritime Security (MARSEC) levels, Port Status and USCG Port Contacts, GPS service interruption and testing notices, International Ice Patrol information and AIS historical data requests. NAVCEN offers a free GovDelivery email subscription and RSS feeds for these topics.

Coverage

U.S. waters and ports at district/sector level, plus GPS service status; Local Notices to Mariners publish weekly, MSIBs and Broadcast Notices to Mariners as issued, and RSS feeds update automatically. History depth is not stated on the checked pages.

Verdict

This is an early signal of US port disruption and navigation risk — safety-zone changes, waterway closures, MARSEC level changes and GPS-interference testing — useful next to MARAD's advisories for the same waters. No separate data licence is stated on the checked pages; Signal Lab links to NAVCEN and its RSS feeds rather than mirroring notices.

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Use in your agent

Poll a NAVCEN Local Notices to Mariners RSS feed into pandas. Checked against the provider's documentation on Nov 5, 2026.

Raw skill file (/skills/uscg-navcen-maritime-safety-information.md)Also in our MCP server: call get_ingestion_skill with {"slug": "uscg-navcen-maritime-safety-information"}.

Access

  • No account or key. RSS feeds are listed on navcen.uscg.gov/subscribe-email-rss-feeds.
  • A free GovDelivery email subscription is also offered for the same topics.

Request

bash
curl -s 'https://public.govdelivery.com/topics/USDHSCG_111/feed.rss'

Format

RSS 2.0 XML with item title, pubDate, guid and link per Local Notice to Mariners update.

Load into pandas and Parquet

Needs Python 3 with requests, pandas and pyarrow.

python
"""NAVCEN Local Notices to Mariners RSS feed -> pandas -> Parquet. No key."""
import requests
import feedparser
import pandas as pd

URL = "https://public.govdelivery.com/topics/USDHSCG_111/feed.rss"
r = requests.get(URL, timeout=60)
r.raise_for_status()
feed = feedparser.parse(r.content)
df = pd.DataFrame([{"title": e.title, "published": e.published, "link": e.link} for e in feed.entries])
df.to_parquet("navcen_lnm_feed.parquet", index=False)
print(len(df), "items;", df["title"].iloc[0] if len(df) else None)

Run by us on 2026-11-05 (python 3 | pandas | pyarrow | requests | feedparser). Result: Fetched the Seventeenth Coast Guard District LNM feed (USDHSCG_111) on 2026-11-05; most recent item was a weekly Arctic District LNM-availability notice.

Limits

  • Each district/topic is a separate feed URL; list them from the subscribe-email-rss-feeds page.
  • History depth is whatever GovDelivery currently retains per feed; not a full archive.

Quirks

  • Feeds are hosted on public.govdelivery.com, not navcen.uscg.gov itself.
  • navcen.uscg.gov pages return HTTP 403 to requests without a browser-like User-Agent header.

Terms and attribution

  • No separate data licence is stated on the checked NAVCEN pages; this is a US Coast Guard (DHS) public safety-information site.

Sources

  • https://navcen.uscg.gov/subscribe-email-rss-feeds: “Navigation Center RSS (Really Simple Syndication) Feeds for various topics”
  • https://navcen.uscg.gov/msib: “District/Sector MSIBs: U.S. Coast Guard MSIBs issued by a District or local Sector/Captain of the Port to communicate region- or port-specific maritime information, such as local safety zones, waterway restrictions, marine events, hazards, and enforcement guidance.”

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