As you're persisting in your mistaken belief that you didn't get any further downriver and into the Ouse simply because you were too late on the ebb, I'll make yet another attempt to explain.
The top picture is looking downriver towards Burton Stather Wharf with Waterton Light visible to the left of the picture. The lower picture is looking upriver at the house and poplar trees at Mere Dyke with the drying ness in the foreground . . . . precisely the same view, but in close-up, as the photo I included in Post #43. This puts the boat that the pictures were taken from between Waddington Light and Waterton Light on a line from Waddington Light to Burton Stather Wharf, and therefore some 150 yards away from the deep channel which is no more than 20 to 25 yards out from the stones along the Western bank between the two lights, until about 200 yards topside of Waterton Light from where it then cuts across a bit more than threequarters the width of the river to Solitary House Light, which is just off the right hand side of the picture showing the crane at Burton Stather.
Some 150 yards North West of where you grounded/anchored there would still have been 10' - 12' at Low Water and a least depth at Low Water of around 4'- 5' in the channel as far as Flats Light, increasing a little until you have South Trent and Trent Ness Lights roughly abeam, and from there on increasing rapidly, at Low Water to 20'+ and then 30'+ from North Trent to Apex Lights.
No matter how late you were leaving Gainsborough, if you had kept to the deep channel from Keadby to Trent End you would not have grounded or had to stop between Mere Dyke and Burton Stather, and could have waited for the flood in the Ouse with 10' to 20' of water under you near Boundary Light.
The enforced stop was due entirely to the fact that you were so far out of the deep water channel, and not an error of timing, as you have convinced yourself was the cause. You were able to continue on your way after the tide turned without any frights or mishaps solely because they weren't exceptionally big tides at the time (9.2m on the Fish Dock Sill - 8.0m above CD at Hull) and only just at the very bottom of the range above which small aegres can begin to form further upriver. Also in your favour was the fact that you floated off and swung round as the tide turned, well before it started flowing at any significant rate. Had you been perched toward the outer, or downriver, side of that bared out ness behind you in the second photograph, and floated off after the tide had picked up some speed, you wouldn't have enjoyed it all quite so much.
Whether the situation arose because you don't know the river sufficiently well to navigate without charts, or the charts you had were no good, or it came about because you mis-read whatever charts you had, is no concern of mine and is irrelevant in any event.
What does matter is that if you wish to help others to prepare better and avoid making the same mistakes, you should recognize and accept that it wasn't yourselves, or your preparation and equipment that kept you and your boat out of trouble that day, it was good fortune and the Gods of the river and tides.
Rather than portraying it to others on this Forum as an inconsequential non event, you would be doing other inexperienced boaters who may be tempted by the last few miles of the Trent, a really good turn by recognizing it for what it was, . . . . a lucky escape from a situation that could have ended very differently if, for example, the tide had been well above predicated height.
It cannot be emphasized too much, that no cruiser or narrowboat should attempt the lower Trent on anything but neap tides unless they're 100% sure that they won't ground anywhere.
Nobody, however experienced, prepared or well equipped they are should ever be foolish enough to think they can cope with whatever the Trent, Ouse or Humber may unexpectedly throw at them. All three of these rivers have on occasion caught out, or even killed, professional bargemen and seamen who've spent their working lives on them.