: The .rar files usually contain a folder structure of "Cells" (vector data) and a SETS.EXT file, which is required by chart plotters to index the data [3, 4].

Searching for "Cartas CM93.rar" typically refers to the nautical charts, which are a legacy format of electronic vector charts used in navigation software like OpenCPN. Key Findings

For safer and legal navigation, modern sailors typically use:

: A source for official S-63 encrypted professional charts [7].