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Started By
Message
Typical under keel draft minimum for very large tanker is 6 feet.
Posted on 7/1/26 at 11:17 am
Posted on 7/1/26 at 11:17 am
Hearing about a tanker getting stuck/grounded off Oman, I decided to investigate "how shallow is too shallow". Marine terminal in Puerto Ricco I managed would receive a 900 foot tanker once a month, and float in with about 5 feet to spare. Thinking like a machinist I thought gee, that's a pretty small run out.
Looking at definitions of Under Keel Clearance, A large crude carrier ship not moving to meet minimum acceptable standards would have about a 6 foot clearance over the entire length. Moving forward, rocking etc would add to that clearance requirement.
Moving a large ship through coastal waters is infinitely more complex than backing a car into a Walmart spot. The presence of Iranian speed boats probably does not add to the captains pucker factor near as much as what tide is present.
11
Posted on 7/1/26 at 11:19 am to Trevaylin
Posted on 7/1/26 at 11:21 am to Trevaylin
Why you pay those high prices for the river pilots with genetically superior knowledge.
Also, think it is a cargo ship that is stuck. That side of hormuz is apparently much shallower than the Iranian approved side.
Also, think it is a cargo ship that is stuck. That side of hormuz is apparently much shallower than the Iranian approved side.
This post was edited on 7/1/26 at 11:23 am
Posted on 7/1/26 at 11:26 am to fightin tigers
quote:
river pilots with genetically superior knowledge.
It has been a solid minute since the OT had a good Sonic knuckle check on that one.
Posted on 7/1/26 at 11:27 am to fightin tigers
quote:
genetically superior knowledge
Only certain families have that DNA.
Posted on 7/1/26 at 11:28 am to Trevaylin
Man you are a strange bird
This post was edited on 7/1/26 at 11:29 am
Posted on 7/1/26 at 11:32 am to fightin tigers
quote:
river pilots with genetically superior knowledge.
I knew two pilots really well. One wasn't born into it but had the money to politic his way in. He was a good guy who's career was cut way to short by a strange autoimmune disease. The other was a nepopilot and was a complete idiot. So much so, that every time a river accident happened we would text him and ask if it was his fault.
Posted on 7/1/26 at 12:07 pm to Trevaylin
I know a guy who is a pilot and according to him in places the bottom of the river is only a foot or two below the keel. Actually the traffic in the river itself acts as a dredge and keeps the silt from building up.
The only time they have problems is like after a long stretch where the river traffic has been shut down by extreme fog. And the channel will actually silt in over those days. So when they start back they have to start with the shallowest boats "knocking the top off" the mud. Then the next boat will be 6 inches deeper and so forth. And they stir up the soft mud as they go down the river gradually opening it back up.
The only time they have problems is like after a long stretch where the river traffic has been shut down by extreme fog. And the channel will actually silt in over those days. So when they start back they have to start with the shallowest boats "knocking the top off" the mud. Then the next boat will be 6 inches deeper and so forth. And they stir up the soft mud as they go down the river gradually opening it back up.
Posted on 7/1/26 at 12:11 pm to Trevaylin
I'm shocked it's that shallow. I had a small sail boat and my draft was 6 feet. Got that dastardly stuck in mobile bay and had to be pulled out by my mast.
Posted on 7/1/26 at 12:12 pm to billjamin
I got to do a ridealong with a pilot bud.
We went from Port Allen to NOLA.
I learned two things:
A lot of tugboat captains have their heads up their asses, and its tricky to pilot those ships when the river current is faster than the top speed of your ship.
We went from Port Allen to NOLA.
I learned two things:
A lot of tugboat captains have their heads up their asses, and its tricky to pilot those ships when the river current is faster than the top speed of your ship.
Posted on 7/1/26 at 12:16 pm to Trevaylin
quote:
Marine terminal in Puerto Ricco I managed would receive a 900 foot tanker once a month, and float in with about 5 feet to spare.
That is why they built LOOP off of Fourchon.
Off load it offshore and pump it in.
Just have to be careful and not spill any like this year.
Posted on 7/1/26 at 12:28 pm to fightin tigers
tide range in the strait of Hormuz is 6 feet this week
Posted on 7/1/26 at 12:52 pm to Trevaylin
Seeing a lot of reports that there isn't an issue and the ship shown is a different ship from months ago.
Posted on 7/1/26 at 12:59 pm to Napoleon
quote:
shocked it's that shallow.
6 feet of clearance below the keel. They draft much more than that. I believe some are as deep as 40 feet, so they would have a 46 foot minimum depth
Posted on 7/1/26 at 1:15 pm to Trevaylin
quote:
A large crude carrier ship not moving to meet minimum acceptable standards would have about a 6 foot clearance over the entire length.
Fully loaded with petroleum?
quote:
Moving a large ship through coastal waters is infinitely more complex than backing a car into a Walmart spot.
Not INFINITELY, that's impossible, harder, more difficult, requires a higher level of complex maneuvers, yes. But not an infinite amount of complexity
Posted on 7/1/26 at 1:17 pm to Trevaylin
quote:
Moving a large ship through coastal waters is infinitely more complex than backing a car into a Walmart spot.
My wife could do both with equal results...
Posted on 7/1/26 at 1:24 pm to DownshiftAndFloorIt
quote:
6 feet of clearance below the keel. They draft much more than that. I believe some are as deep as 40 feet, so they would have a 46 foot minimum depth
I posted it again for the people fricking off in the back
Posted on 7/1/26 at 1:32 pm to Trevaylin
Can't Musk just fire up a few of his boring machines and dig a canal across the United Arab Emirates' peninsula?
Just bypass the whole Strait.
Just bypass the whole Strait.
Posted on 7/1/26 at 1:34 pm to Trevaylin
quote:
Thinking like a machinist I thought gee
leave me out of this
Posted on 7/1/26 at 1:39 pm to chity
Google the Stad Ship Tunnel. If it ever gets fully built.
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