>>713833982
It is confirmed after.

Tanker chapter was originally
>Snake lands on tanker from bridge
>searches for USP
>fights Olga
>searches for Metal Gear
>Ocelot appears and steals RAY
>escape from tanker and make way back to bridge
>fights marine piloted Harrier when they think he was the one who sunk tanker
>Otacon delivers Liquid's body to the scene

It was quite a bit longer. You could probably refer to it as the first third of the game pre release.