Comments by "Keit Hammleter" (@keithammleter3824) on "National Geographic" channel.

This video purports' to show a line on the hull where the iceberg hit. There is one big problem with this: the bow has been driven into the sea bed, such that the anchors are almost at the sea bed. At the time of impact, the anchors were well above the water. The impact point must now be hidden under the sand. Any fault line or split now visible in the composite photos and digital models must be due to the vertical crushing due to the impact with the sea bed, not the impact with the iceberg. This video says icebergs can damage ships because the ice under a surface layer is very hard. This is no so - the compressive strength of ice is a tiny fraction of that of common materials such as plastics - plastics being typically 100 times stronger and metals even stronger again. The reason why bergs can damage ships is because of the shear mass of ice - the immense inertia of the iceberg means that the ice at and near the ship has nowhere to go. An analogy - the compressive strength of water is zero - that's what defines a liquid. But if you fall from a great height and hit the water at high speed, you will be serious injured by the impact - killed if your initial height is sufficient.
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Regarding the test of how long it takes to launch a lifeboat, shown beginning about 20 minutes in: Something I learned when I was a fire warden in an 18 story building: When we moved in, we scheduled a fire drill, and told all the workers in the building what day and time the drill would be. Came the day and we got everyone out of the building in about 24 minutes. We fire wardens (one per floor plus a captain) held a post-mortem meeting and worked out what went well and where we stuffed up. A few weeks later we did another pre-announced drill. It worked well, and we got everyone out within 8 minutes. A very good achievement. A few months later we decided to have a proper drill - that is, we didn't tell anyone there would be a drill. We arranged with the city fire brigade that they would send a couple of fire trucks with sirens going, and they gave us a smoke bomb, to add a bit of realism. The drill was a shambles. Most people suspected it was another drill, but many thought it was real - they thought the building was actually on fire. There was a panic, difficult to control. It took 18 minutes to get everyone out, and some we couldn't account for - they just cleared out. The moral is: You can do tests, you can do drills. But if it is a real emergency, things will go wrong, people won't follow orders, and it will take longer. So yes, on the night on Titanic they did very well. even though not all boats were full.
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