NGA Nautical Chart 81127: Helen Reef (West Caroline Islands) Media:Paper The white background is three

The white background is three times the width of the red

Coast Guard uses

It assists mariners in making informed decisions and enhances their understanding of the navigational challenges they may encounter

British Admiralty Nautical Chart  4250: Bahia Corral to Isla Guafo is a standard nautical chart

Vivid Color Retention: Advanced dyeing technology ensures ultramarine blue

NGA Nautical Chart 81127: Helen Reef (West Caroline Islands) Media:Paper The white background is threeThe chart you are viewing is a NGA standard nautical chart. The National Geospatial Intelligence Agency (NGA) has partnered with OceanGrafix to provide commercial and recreational mariners with a good source of nautical chart coverage for international waters. These charts are "printed on demand" but do not contain the latest notice to mariner (NTM) corrections. It is the mariner's responsibility that the necessary chart corrections be applied to