Navigation Challenges - Post Your Craziest Chart and Let’s Talk

[Wotname]

Originally Posted by Chotu

Good Lord. I was trying to inject a little bit of fun into the forum. God forbid.

Only a few people seem to get that this was a thread for entertainment.


..................

Yep, good thread and kudos for starting it. It did cross my mind it might have had a whiff of April 1st about it but alas it wasn't so...

RaymondR's example (#45) is a good one; even in shallow draft cat, ya gotta work the tides and especially so in a deep-keeler. The upside is you get the tide with you both on the flood and ebb.

[PippaB]

This one is kind of fun. The problem with charts is they don't show how high the mud is at low tide, so you don't know how much water you'll have at high tide The water here is filled with glacial till, so no seeing anything, and the currents are strong, but it can be done if you are of such a mind. Of course, doesn't help that the right route is always changing.



Here's another one from the same neck of the woods, complete with markers along the whole "channel":



In both cases, the key question is "how deep will the water be at high tide?" Sure would be cool if those ENCs had a "depth at MHW" layer or something like that.

[SeanPatrick]

Originally Posted by aqfishing

Always deeper on the outside of the turn?

That's generally true. As explained in the video below, water flows faster on the outside of a bend and slower on the inside. This results in erosion on the outside (a "cut bank") and deposition on the inside (a "point bar"). Of course, many factors affect the morphology of a waterway, so it's not always so simple.

(Skip to 12:05 to see the part about bends.)

[Chotu]

I found a new one!

See the danger marker? Do you leave this to port or starboard?

[El Pinguino]

Orientation? Try Chilean buoyage - from CruisersWiki
'In common with the rest of the Americas Chile is an IALA B country ( 'red right returning'). 'From seaward' is taken to mean from south to north through the channels ( an exception being Canal Magdalena ) unless they have east-west orientation in which case the buoyage runs from west to east. In the approaches to ports, the buoyage runs as you would expect it to run. An interesting feature is that the greens have can topmarks and the reds have cones.
An apparent exception to the rule is the buoyage as you enter Rio Tempanos on the way into Laguna San Raphael. While you would expect this to be treated as a river or port entrance the 'from south to north' rule - see above - still applies and as a result you leave red to port when entering the river.'

Meanwhile in Bathurst Harbour , SW Tasmania.
The starboard hand withies have green Victoria Bitter cans as topmarks, port hand have red Melbourne Bitter cans.