The lifeboat question has never been as simple as the public perceives it to be. Just putting lifeboats on a passenger liner does not automatically insure 100% survival of passengers and crew. This was a well-known and accepted fact in 1912. We have become considerably less knowledgable over the years since. Sadly, most of today's public believes that if there are enough lifeboats, everyone will survive a major casualty at sea. Life is not that forgiving.
Titanic was probably the only time in recorded history in which a major passenger vessl sank in dead calm water. And, to my knowledge, it is the only passenger liner that remained bolt upright (or nearly so) during the entire time of foundering. The reality--known in 1912 and accepted as such--was that in an emergency it is unlikely that more than half of the lifeboats in conventional davits will be useful. For proof, look at photos of
Andrea Doria sinking with all of its port side boats still in their stowed positions.
As I pointed out in "Last Log," the crew of Titanic did a fantastic job of launching boats in the dark with great rapidity. Even so, they did not have enough time to launch all 24 lifeboats available. Two of the collapsibles floated free. Additional boats, had they been carried, would not have been launched simply because Titanic would have foundered before those boats could have been rigged and swung out for loading.
The 100% lifeboat requirement was (and is) mostly a sop to the passengers. It's feel good stuff designed to calm the fears of the faint at heart. The truth of the matter in 1912 is the same as in 2002 -- death is certain when a major ship sinks. Lifeboats do not assure that everyone has a front-row seat to the foundering.
Lifeboats have only been successful in saving large numbers of lives when the boats have been used as transfer craft, moving people from the foundering vessel to the rescue ship (or ships). Requirements for 100% lifeboat capacity increase safety only in-so-far as the increased number of boats means that a larger number of lifeboats will be available for transferring people. In any maritime casualty, it must be assumed that some large percentage of conventional lifeboats will be rendered useless.
Of far more concern to the public should be the subdivision and stability of the passenger vessel. And, just as in Titanic's case, both are sacrificed on the altar of public convenience. We know that no ship can be 100% unsinkable. That is not the goal of subdivision. Rather, the purpose is to delay foundering long enough for the rescue of the passengers and crew. The design of
Andrea Doria allowed for that eventuality--the ship sank, but slowly enough for nearly everyone to be rescued. Titanic, failed in this vital aspect of safety.
Why the focus on lifeboats? Because they are a quick, cheap "fix." Adding higher bulkheads is time consuming and expensive. Also, the public does not want to go up and down ladders (marine stairways) when moving about the ship. Adding boats made the public feel better after Titanic, but it did not materially improve the safety of passengers.
-- David G. Brown