0.5.1-alpha5

An Alpha 5 maintenance update with more consistent coordinate validation, decimal support for airport and runway positions, and corrected colouring of FIX records.

Fixed

• Airport positions and runway endpoints now accept decimal latitude/longitude pairs. Decimal support for FIX, VOR and NDB definitions is retained, including longitudes with leading zeros.
• Coordinate validation consistently checks full dotted and compact DMS formats, decimal length limits, hemisphere, and geographic ranges. Abbreviated DMS values are rejected instead of being mistaken for navigation references.
• Coordinate pairs reject mixed DMS and decimal values while preserving supported combinations with FIX, VOR or NDB references.
• Coordinate colouring now leaves FIX identifiers such as AAL, AAL08 and AAL12, and trailing type fields, unchanged when highlighting a decimal position.
• Additional readers warn about missing trailing semicolons. Normalised clipboard rows include the terminating semicolon before any inline comment.
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Known limitations

• DMS coordinates require the complete 14-character dotted or 11-character compact format. Decimal coordinates allow at most 13 characters, including the sign and decimal point.
• The root [INFO] block continues to require dotted DMS. Navigation references remain limited to fields that support them.