Ensure your OpenCPN display settings are configured to show the necessary depth soundings and safety contours for your vessel's draft.
What you are using (Windows, Mac, Linux, or Android?) The specific navigation software you plan to install
CM93 v2 charts are a legacy set of global marine vector charts originally produced by C-Map. They have become a cornerstone for amateur mariners and cruisers due to their extensive coverage and compatibility with open-source navigation software like ⚓ The Role of CM93 v2 in Modern Navigation
Complete Guide to CM93 v2 Charts: Features, Uses, and How to Download
: Ensure that the source of the charts is legitimate. Downloading copyrighted material without permission is illegal. Many charts are provided by government agencies or private companies that have invested significant resources in creating them. cm93 v2 charts download
Note: CM93 v2 charts are no longer officially updated by C-MAP. They should be used for situational awareness and passage planning rather than precise, high-risk coastal navigation, where updated official S-57 ENCs are required. How to Download and Install CM93 v2 Charts in OpenCPN
Because they are vector-based rather than high-resolution raster images, they pan, zoom, and render rapidly on low-spec onboard laptops, Raspberry Pi systems, and tablet computers.
Because vector charts contain highly customizable data layers, you should adjust your display preferences for optimal readability:
If you have acquired a legitimate reference copy of the CM93 v2 database, installing it into OpenCPN is a straightforward process. Step 1: Prepare the Directory Ensure your OpenCPN display settings are configured to
As a vector chart format, CM93 v2 features multiple scale levels for each geographic area. Charts are available for different purposes: overview charts, coastal charts, approach charts, and harbor plans. When you zoom in or out, compatible navigation software automatically selects and displays the most appropriate scale.
: The entire global database fits on a standard USB flash drive. Key Features of CM93 v2
Even today, boaters on tight budgets, or those maintaining older hardware, search for a downloadable copy to avoid recurring subscription fees that modern chart services require.
often maintain links to regional chart sets (e.g., SE Asia, Indian Ocean, Western Pacific) for the cruising community. Community Forums They should be used for situational awareness and
The most common question regarding CM93 v2 charts is, "What is the latest version available?"
. Most CM93 v2 datasets are extremely old, with major updates ending around 2011–2015. Users report significant detail gaps in areas like Mexico and Southeast Asia, where even dated charts have seen detail removed or relocated. Compatibility Excellent for OpenCPN . These charts are natively supported by
Under > Charts , look for the Vector Chart Display settings.