Recent content by robert_craig0

Here's a picture taken 13:20 BST 19 June 2022 re taked 13:20 BST19 June 2022

Yes, I know he was expected to go where he was told - but it's easier to steer a boat (and so presumably a ship) if you can watch the bow against a cloud or something. "I must go down the the sea again ... and a star to steer her by". Certainly doesn't seem to make it easier (or safer) not...

Right, thanks very much for this info. Next puzzle: on a number of ships which I've looked at (not many, mostly models in the Glasgow Museum of Transport), I notice that the wheel is situated where the helmsman can't see where he is going. So he must have just steered by the compass. But it's...

I'm aware that prior to 1930 or so it was a custom on at least some ships to order "Port your helm" to initiate a turn to starbord. After that date it became illegal, and the order was "starboard" for a turn to starboard. I also tried for the first time recently wheel steering (rather than...

Remember that spring tides are at a fixed time of day ('cos they're controlled by the sun), and that winds tend to be strongest during the day (wind tends to drop in the evening), so a corelation between stong wind and spring tide in a particular place wouldn't be surprising.

Re: Belfield Tide Plotter The UKHO SHM programme (£36) works forever and very tidily, though one does have to enter the harmonic constants (from a not-necessarily-current version) of the ATT. Gives nice plots, maps, moon phase etc.

Thanks for this: but where have you posted the private reply? I've looked in my inbox, and I find only a welcome message from "administrator" Robert <hr width=100% size=1>

I'm a user of the excellent UK hydrographic office tidal predicion program SHM. This uses tidal constants manually entered from the Admiralty Tide Tables and predicts tide heights. It also has a facility for prediction tidal streams, given the right constants. Anyone know where I can get ot buy...