Overview
Over 18,000 official Electronic Navigational Charts
The ADMIRALTY Vector Chart Service (AVCS) is the world’s leading official digital maritime chart service, with around 18,000 official Electronic Navigational Charts (ENCs) to help bridge crews navigate safely and efficiently whilst meeting flag and port State requirements.
Key features of AVCS:
- Global maritime ENC coverage with more routes and ports than any other competing service
- Unique ADMIRALTY Information Overlay (AIO) for additional passage planning information
- Weekly updates available via email, online or on DVD to ensure ongoing safety and compliance
- Delivered in industry standard S-63 / S-57 formats, guaranteeing compatibility with all ECDIS sold today – even in a mixed fleet
- Online version available for shore-based activities


ADMIRALTY Information Overlay
The ADMIRALTY Information Overlay (AIO) aids navigators at the crucial passage planning stage.
It contains ADMIRALTY paper chart Temporary and Preliminary Notices to Mariners (T&P NMs) where the information is not encoded into the underlying ENC. It also contains ENC Preliminary Notices to Mariners (EPNMs), which highlight navigationally significant differences between ENCs and ADMIRALTY paper charts.
AIO can be displayed as a single layer on top of ENCs on the majority of ECDIS currently being sold, and also on back-of-bridge software. All AVCS customers receive the unique AIO at no extra cost.

Carriage-compliant ENCs
All ships using AVCS on-board receive a UKHO certificate. This certificate can be used for local inspections and confirms that all Electronic Navigational Charts (ENCs) in AVCS satisfy the chart carriage requirements of SOLAS Chapter V.
AVCS meets the latest mandated data protection standard from the International Hydrographic Organization (IHO), which helps to reduce the risk of both data piracy and the distribution of unofficial, dangerous data to mariners.

Ongoing safety and compliance
All AVCS customers are supplied with weekly electronic updates via internet download, email or disc – ensuring that bridge crews and shore-based teams have access to complete and up-to-date information. These electronic updates reduce time and effort spent making manual updates to paper charts, minimise the risk of human error and help to ensure compliance with Flag and Port State requirements.

More routes, more ports
The ADMIRALTY Vector Chart Service (AVCS) provides the widest official ENC coverage available, enabling ships to navigate on ECDIS for the entirety of most major routes on a single chart service. This coverage includes 4,000 of the biggest ports worldwide, of which we offer unique coverage for over 70.

Compatible with all type-approved ECDIS makes
AVCS is delivered in industry standard S-63 / S-57 formats, guaranteeing compatibility with all type-approved ECDIS sold today. Please see the Specifications section below for a list of systems that are also compatible with the ADMIRALTY Information Overlay.

ADMIRALTY Information Overlay
The ADMIRALTY Information Overlay (AIO) aids navigators at the crucial passage planning stage.
It contains ADMIRALTY paper chart Temporary and Preliminary Notices to Mariners (T&P NMs) where the information is not encoded into the underlying ENC. It also contains ENC Preliminary Notices to Mariners (EPNMs), which highlight navigationally significant differences between ENCs and ADMIRALTY paper charts.
AIO can be displayed as a single layer on top of ENCs on the majority of ECDIS currently being sold, and also on back-of-bridge software. All AVCS customers receive the unique AIO at no extra cost.

Carriage-compliant ENCs
All ships using AVCS on-board receive a UKHO certificate. This certificate can be used for local inspections and confirms that all Electronic Navigational Charts (ENCs) in AVCS satisfy the chart carriage requirements of SOLAS Chapter V.
AVCS meets the latest mandated data protection standard from the International Hydrographic Organization (IHO), which helps to reduce the risk of both data piracy and the distribution of unofficial, dangerous data to mariners.

Ongoing safety and compliance
All AVCS customers are supplied with weekly electronic updates via internet download, email or disc – ensuring that bridge crews and shore-based teams have access to complete and up-to-date information. These electronic updates reduce time and effort spent making manual updates to paper charts, minimise the risk of human error and help to ensure compliance with Flag and Port State requirements.

More routes, more ports
The ADMIRALTY Vector Chart Service (AVCS) provides the widest official ENC coverage available, enabling ships to navigate on ECDIS for the entirety of most major routes on a single chart service. This coverage includes 4,000 of the biggest ports worldwide, of which we offer unique coverage for over 70.

Compatible with all type-approved ECDIS makes
AVCS is delivered in industry standard S-63 / S-57 formats, guaranteeing compatibility with all type-approved ECDIS sold today. Please see the Specifications section below for a list of systems that are also compatible with the ADMIRALTY Information Overlay.

ADMIRALTY Information Overlay
The ADMIRALTY Information Overlay (AIO) aids navigators at the crucial passage planning stage.
It contains ADMIRALTY paper chart Temporary and Preliminary Notices to Mariners (T&P NMs) where the information is not encoded into the underlying ENC. It also contains ENC Preliminary Notices to Mariners (EPNMs), which highlight navigationally significant differences between ENCs and ADMIRALTY paper charts.
AIO can be displayed as a single layer on top of ENCs on the majority of ECDIS currently being sold, and also on back-of-bridge software. All AVCS customers receive the unique AIO at no extra cost.

Carriage-compliant ENCs
All ships using AVCS on-board receive a UKHO certificate. This certificate can be used for local inspections and confirms that all Electronic Navigational Charts (ENCs) in AVCS satisfy the chart carriage requirements of SOLAS Chapter V.
AVCS meets the latest mandated data protection standard from the International Hydrographic Organization (IHO), which helps to reduce the risk of both data piracy and the distribution of unofficial, dangerous data to mariners.
Available around the world
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We distribute our products through a global network of experienced and trusted ADMIRALTY Distributors. If you are interested in finding out more about AVCS, please contact your preferred distributor or visit the find a distributor page to locate your closest distributor.
Specifications
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ECDIS and ADMIRALTY Information Overlay compatibility
All ECDIS equipment must undergo a type-approval certification process to ensure it meets IMO Performance Standards for ECDIS. AVCS is compatible with all ECDIS and ECS (Electronic Chart Systems) that meet these requirements. You can find out more about type-approval and get advice on ECDIS implementation by talking to an ADMIRALTY Distributor.
The following table lists display systems that currently support both AVCS and the ADMIRALTY Information Overlay (AIO).