This extension allows for the input of critical points and openings (e.g. ventilation openings, down-flooding points, deck edge points, weather tight openings, tank connections, class-A boundaries and escape route points). 
This extension allows for the input of critical points and openings (e.g. ventilation openings, down-flooding points, deck edge points, weather tight openings, tank connections, class-A boundaries and escape route points).
