This utility model presents two fundamental features: a) telescopic loading bridge; b) ballast tank mounted on motor crawler tracks. Feature a) enables the adjustment of the landing stage to any type of boats and/or coasters, and the appropriate adjustment of the landing stage's length to any littoral, high tide and to any exceptional conditions which might arise during the normal operating time. The retractility function enables the easy removal of the landing stage from its designated location; Feature b) enables to move the whole structure to safer locations when the original location is exposed to particularly strong surges which might endanger the stability and the normal functioning of the landing stage. Once the exceptional condition has ceased, the motor crawler tracks will enable the landing stage to return to its normal functioning. Said feature therefore reduces the eventual "inactivity" of the landing stage.