Second funnel

The second funnel was a real funnel (not like the fourth funnel), at the RMS Olympic, the RMS Titanic, the RMS Empress of Ireland, the RMS Lusitania, and the HMHS Britannic.

Olympic
The second funnel remained on the ship until the 1930s, when the Olympic was dismembered.

Titanic
When the Titanic was sinking, it blew up at 2:16 or somewhere in the sinking and it blew up and almost fell on Jack Thayer. It never fell in the 1997 movie.

Britannic
The Britannic's funnel was all yellow, and flew to starboard side. In "Britannic", it fell.

Empress of Ireland
There were only 2 funnels at the ship of the Empress. When it was sinking, it is not known if it fell, yet it is not there in the wreck.

Lusitania
Like the Olympic, Titanic, and Britannic, Lusitania is a Four funnel ship. When it is sinking, it is known that the third funnel fell first, then the remaining. Since in the wreck, the ship's front blew, none of the funnels are there.