How do I download NOAA charts for free?

The Office of Coast Survey provides free BookletCharts, which are 8 ½” x 11” PDF versions of NOAA nautical charts that can be downloaded and printed at home. The U.S. Coast Pilot is also available in a free PDF version.

What is an Imray chart?

Imray charts are ideal for small craft. Buy Imray charts now. Next. Nautical charts for leisure sailors. Our skilled cartographers customise the latest official data from international Hydrographic Offices including UKHO, SHOM, BSH to show the most relevant information for leisure and small craft sailors.

What is the difference between Admiralty and Imray charts?

Difference between Imray Charts and Admiralty Charts Admiralty charts are in great detail and are not waterproofed. This makes it easier to do detailed non-electronic navigation. On the other hand, Imray charts are mostly intended for leisure use as they are a little less detailed and are made out of waterproof paper.

How do I use Imray charts app?

Tap the cross or tick symbols to turn Chart Indicators and Chart Data on/off. Touch indicator icon once to show coordinates, bearing and distance or other data. Double tap to show a popup Edit menu. Touch-hold then drag to move.

What is chart classification by scale?

1. Charts are constructed on many different scales, ranging from about 1:2,500 to 1:14,000,000 (and even smaller for some world charts). Small-scale charts are used for voyage planning and offshore navigation. Charts of larger scale are used as the vessel approaches land.

What does green mean on a nautical chart?

Green. Areas in green have water covering them at high tide, but will be exposed during low tide. Obviously, you’ll want to be very careful around these areas when driving your boat nearby. These are typically sandbars, shallow islands, or even oyster bars.

How do you read an admiralty chart?

Read the chart numbers to figure out the water’s lowest depth. The black numbers printed on the chart represent water depth. Each number indicates the “mean lower low water” (MLLW) in an area. This is the average water depth at low tide, so most of the time the water is deeper than what you see on a chart.