note: Australia's last aircraft carrier fleet was decommissioned in 1982. The current Sydney and Melbourne are guided missile frigates, and the current Albatross is a naval base on land near Nowra[?].
... and the vaginal opening.
In the human male, the urethra is about 8 inches (200 mm) long and opens at the end of the penis.
Medical problems of the urethra:
...