Admiralty Charts

UKHO Admiralty nautical charts — paper charts, AVCS ENCs, and NP publications for all trading areas. The most widely used chart suite in global maritime navigation.

Paper Charts

3,500+

AVCS ENC Cells

16,000+

Chart Updates

Weekly (digital)

NP Publications

200+

Admiralty Chart Series

Standard Admiralty Charts

BA Charts

Full paper chart series published by UKHO — over 3,500 charts covering all trading routes

Scale: 1:2,500 – 1:3,500,000Coverage: Global

Paper

AVCS (Admiralty Vector Chart Service)

AVCS

Official ENCs for ECDIS — complies with IHO S-57 standard, updated weekly

Scale: Various ENC scalesCoverage: Global

Digital ENC

Admiralty Raster Charts (ARCS)

ARCS

Raster images of BA paper charts — for ECDIS backup or PC chart display

Scale: Matches paperCoverage: Global

Digital RNC

ADP (Admiralty Digital Publication)

ADP

Digital sailing directions, tide tables, light lists and other NP publications

Scale: N/ACoverage: Global

Digital NP

Leisure Charts

Leisure

Detailed inshore charts for recreational mariners — harbours, estuaries, coastal waters

Scale: 1:5,000 – 1:150,000Coverage: UK/Ireland/Europe

Paper

Chart Scale Categories (IHO)

Type	Scale	IHO Usage	Use
Overview / Ocean	1:3,500,000+	INT 1 — Overview	Ocean passage planning, general routing
General	1:350,000 – 1:1,500,000	INT 2 — General	Coastal passage planning
Coastal	1:30,000 – 1:350,000	INT 3 — Coastal	Coastal navigation
Approach	1:7,500 – 1:30,000	INT 4 — Approach	Port approaches and anchorages
Harbour	1:500 – 1:7,500	INT 5 — Harbour	Berthing, detailed port navigation

NP Publications

Admiralty Sailing Directions (NP)

NP 1–75

Pilot books for all major sea areas — harbour approaches, tides, currents, dangers, regulations

Admiralty Tide Tables

NP 201–208

Annual tide predictions for standard and secondary ports worldwide

Admiralty List of Lights

NP 74–84

Characteristics of all aids to navigation — lighthouses, lightfloats, buoys

Ocean Passages for the World

NP 136

Recommended ocean passages and routes for sailing and powered vessels

Admiralty Distance Tables

NP 350

Sea distances between major ports in tabular format

INT 1 — Chart Symbols and Abbreviations

NP 5011

Complete guide to chart symbols, abbreviations, terms and notation

Correction Services

Notices to Mariners (NtM) — weekly corrections to paper charts. Apply before sailing.

AVCS Updates — digital ENCs updated weekly by cell. Automatic via distributor.

T&P Notices — temporary and preliminary corrections for short-term navigational hazards.