You seem to dismiss Olliver's, "and was just entering on the bridge just as the shock came" all too easily. If he was only around boat #7, he would not have been near Hichens when the hard-aport order came. Also if what they struck was only 30 ft above the water, it couldn't be seen from the boat deck. At the Ryan trial, Lee said: "It was as high as the boat deck." That would match Olliver's description of seeing only the peak of the berg pass by.
On S.O.T.H., p. 70, Fig.3-02, You wrote; «
QM Olliver sees the peak of the iceberg pass aft of the bridge». Olliver was never there when the berg went by and its peak was not above the bridge wing shelter. If it had been, the emergency cutter No.1 would have been ripped away!
You seem to dismiss Olliver's testimony all too easily.
I just read what he stated in the more impartially and conscientiously that an experimented mariner could. Not to search for, interpret, favor, and recall information in a way that confirms or supports prior beliefs.
Olliver could not be at two different places in the same time; stop perceiving the grinding noise, sighting the berg getting away from the ship’s side forward of the place he was standing -and- feeling the shock just as he was entering the bridge. Note; the berg grinded all the way past WT Bulkhead E, amid BR No.6 and No.5, which lined ups between Lifeboat 3 and 5.
The safest place if not the only, where he could observe the berg so accurately, was from the Boat Deck behind lifeboat 7, not between Lifeboat 3 and 5.
- The berg was almost alongside of the boat, sir. The top did not touch the side of the boat, but it was almost alongside of the boat.
- The iceberg got away from the boat before the place I was just abaft the bridge.
Olliver only heard the Hard-a-port order prior entering the bridge. Once by the wheelhouse, he visually observed the helm over to port and as a rule, the officer standing aside the quartermaster to see that helm orders were carried out as demanded.
The small pinnacle iceberg Rostron almost collided with was estimated at around 30 ft high above the water. That berg was sighted at day break and estimated by eyesight alone from a quarter mile off. It is well recognized that mariners have difficulty in estimating the wave heights just off side and during bright day light. You need some tables to evaluate them more accurately. Was Rostron iceberg 30 ft precisely or could have been higher?
The medium iceberg width you depict (200-400ft) and its height (~60ft) by association of the boat deck, only support a change of heading of 2 points in 37 seconds. But I am sorry to say that such a blocky iceberg would have been seen in advance to be avoided. On another note, a smaller pinnacle iceberg which could have easily reached that height would only have half that width or less. And half that width meant half an alteration of heading prior collision and in proportion, sighted half closer. That would correspond much more to the testimonies of those who were there and lived to tell their stories, if interpreted correctly. The problem is to convince how such a small stealth iceberg could have sunk the largest insubmersible liner of the whole world that easy; but icebreaker commander Toomey answered it. Breaking in two at sea surface while sinking in a dead calm ocean did not improve her weak reputation either!