Collapsable B was an 'Engelhardt Type Collapsable' raft that was stationed above the officers quarters on the port side of the RMS Titanic beside the most-coward funnel. It was the 10th lifeboat to leave from the port side and the last Collapsable leaving the ship. Preparation began just before 2:00 AM but it was a giant problem to get the lifeboat ready. 2nd Officer Charles Lightoller and Junior Wireless Operator Harold Bride had slid the lifeboat from the roof at around 2:09 AM. Around 40 people had been gathered around the Officer's Quarters while water had been moving up the deck. Harold Bride had been trying to look for Jack Philips, who has supposedly went aft, and decided to help with the launching of Collapsable B.

Around 2:09 AM, the men had pushed the raft, making it flip off the roof, with 2-3 people, including Bride, falling onto the deck, the raft had flipped and landed upside down, pinning Bride under it. Lightoller went to the starboard side to help with Collapsable A however saw it had been launched, thus going to the front and jumping in the water as water began to rush the deck. A few minutes later sinking progressed rapidly and it seemed to speed up, and the raft couldn't be righted and tied to the davits, as it did Collapsable A. The raft was then occupied by around 6 people with many clinging to it, as the man already on top began taking oars and warding off swimmers. The raft completely floated off the ship at around 2:12 AM with 12 people aboard, including Bride, Lightoller, and Archibald Gracie IV. They began helping aboard as many as they could until around 30-32 people occupied the boat, by then started pushing others away.

Crewman John Collins who had survived on Collapsable B by swimming has testified in the US inquiry saying:

"So me and the other steward and the 2 children and the woman came around the side, the starboard side, and when we got around there that we saw it was forward. We saw the collapsable boat taken off the saloon deck, and then the sailors and the firemen that were forward seen the ship's bow in the water and seen that she was intending to sink her bow, and they shouted for all they were worth we go to aft, and word come there was a boat getting launched, so we were told to go aft, and we were just turning around and making for the stern and when the wave washed us off the deck - washed us clear off it and the child was washed out of my arms; and the wreckage and people that were around me, they kept me down for at least 2 or 3 minutes under the water."

"Well sir (talking to Senator Bourne) the boat was taken off the saloon deck, and the wave came up and washed the boat right off, and she was upside down, sir, and the water rushed over her. She was turned over, and we were standing on her."

It could be possible that Collins had mistaken the upturned Collapsable B for Collapsable A, as Collapsable B had made it to the starboard side thag this point. Around 2:15 AM, the raft had around 8 people onboard, with Lightoller and many others clinging to it, the raft had reared past the coward-funnel stopping near the almost-swamped Collapsable A that was having a worse situation than Collapsable B. The water had caused the funnel to collapse, nearly missing the lifeboat bh mere inches; pushing it away from the ship. Lightoller reported:

"A but later, the forward funnel guise carried away. And the funnel, weighing perhaps 50 or 60 tons, fell down with a crash on the water, it missed the raft by some of us hanging onto it, by inches. The wash of the falling funnel had evidently picked us up, raft and all."

3 minutes later, the ship's stern was high in the air, and her lights went out, she split with many onboard reporting the break-up sound as an explosion from the boilers, mostly denying a split, the Titanic later went under and they all muttered 2 words, "she's gone". During the night, survivor Victor Francis Sunderland had reported a man asking how many Catholics were aboard the raft, he than began asking the Lord's Prayer, other survivors had joined in. Around 4 occupants had perished during the hours that followed. One supposedly David Livshin. Lightoller had than completely took charge of the 30 men on the raft, as he decided to boost the morale by asking Bride (whom Lightoller testified as John Philips) how long it would take for the Carpathia to arrive. Bride answered "An hour or so sir."

Survivor Patrick O'Keefe had reported that he saw 2 men, one being a Guernsey man, and another Southampton man. It could be possible that the Guernsey man Patrick saved was victim Robert Edward Steel, who was a Guernsey native, and trimmer aboard Titanic. By 4:30 AM, when the sun had started to rise, a man, possibly Archibald Gracie IV, pointed out 4 boats in the distance. Lightoller took out his whistle which had been in his pocket, and gained the attention of lifeboat 4 and lifeboat 12. He ordered them over and pick up the remaining survivors, the boats subsequently came over and collected the 27 survivors. Lifeboat 12 taking 16, along with Lightoller who took charge, and lifeboat 4 taking the other 11. Collapsable B was left adrift in the ocean. On April 20th, during a recovery voyage by the CS Mackay-Bennett to retrieve bodies from the wreck, Collapsable B was found adrift in the ocean. Lifeboats tried to tow Collapsable B with no success.

Notable People Aboard Collapsable B:
Charles Herbert Lightoller, Second Officer (took charge when he arrived)

Harold Bride, Junior Wireless Operator

Sidney Edward Daniels Third Class Steward

Thomas Arthur Whiteley First Class Saloon Steward

Cecil William Fitzpatrick Engineer's Mess Steward

William Charles Lindsay Fireman

John O'Connor* Fireman?

Harry Senior Fireman

John Haggan Fireman

Walter Hurst Fireman

James McGann Trimmer

Eustace Philip Snow* Trimmer

George Alexander Prangnell* Greaser

Isaac Hiram Maynard Entree Cook

John Collins Scullion

Archibald Gracie IV First Class Passenger

John "Jack" Borland Thayer III First Class Passenger

Miss Edith Evans* (A?) First Class Passenger

Patrick O'Keeffe* Third Class Passenger

Thomas Joseph McCormack Third Class Passenger

William John Mellors* (A?) Second Class Passenger

Albert Johan Moss Third Class Passenger

Victor Francis Sunderland* Third Class Passenger

August Edvard Wennerström* (A?) Third Class Passenger

Oskar Willhelm Olsson Third Class Passenger

Charles Eugene Williams Second Class Passenger

Rhoda Mary Abbott* Third Class Passenger (A?)

Edward Arthur Dorkings* Third Class Passenger

Algernon Henry Barkworth First Class Passenger

David Livshin (passed away, possibly on the boat; Saved out of the water)

Charles John Joughin Chief Baker

Eugene Patrick Daly Third Class Passenger
* = not certain

Sources:
Titanic Wiki