It's on the chart

[zoidberg]

I've sailed close by there many times over the years, but today I discovered 'NE Rock' some 1056 feet bearing 052T from the Eddystone Light, awash at chart datum. "Now there's a surprise..."

No, I didn't 'discover it' the hard way, but by an unusually close scrutiny of the chart BA1631 and 'The Plan'. A chunk of complacency, lurking there.....

 

[Channel Sailor]

It is interesting to look at a comparison between Imray (app) and Navionics (web viewer). This rock being a useful example. For my requirement for Navigation I find the Imray clearer/safer to use.

Other examples comparing:

Bramble bank area, particularly the NE patch by Hillhead buoy. The is a 2m contour on Imray which I cannot see on the Navionics web viewer (it has a 2.4 min). Though maybe the Navionics app itself is more in alignment. BTW I think I saw a yacht aground near here last week.

In the same area just South if Maravel buoy Navionics (web viewer)shows a 0.7m minimum depth whereas Imray shows 1.2m.

For the Dorset coast between Chapmans Pool and Weymouth. The is a lot of clutter on Navionics whereas Imray is easier on the eye yo see what is relevant for me.

FYI, For navigation I use use a mix of Imray and Admiraty paper charts, with regular use of Imray Navigator in iPad.

 

[Boathook]

It is interesting to look at a comparison between Imray (app) and Navionics (web viewer). This rock being a useful example. For my requirement for Navigation I find the Imray clearer/safer to use.

Other examples comparing:

Bramble bank area, particularly the NE patch by Hillhead buoy. The is a 2m contour on Imray which I cannot see on the Navionics web viewer (it has a 2.4 min). Though maybe the Navionics app itself is more in alignment. BTW I think I saw a yacht aground near here last week.

In the same area just South if Maravel buoy Navionics (web viewer)shows a 0.7m minimum depth whereas Imray shows 1.2m.

For the Dorset coast between Chapmans Pool and Weymouth. The is a lot of clutter on Navionics whereas Imray is easier on the eye yo see what is relevant for me.

FYI, For navigation I use use a mix of Imray and Admiraty paper charts, with regular use of Imray Navigator in iPad.

My navionics on the mfd shows a lot of clutter between Chapmans and Weymouth but as I zoom in the mass of red crosses become individual'rocks'. So far I have found navionics very accurate with rocks and other obstacles.

 

[Davy_S]

 

[dom]

They are after all called the Eddystone 'Rocks' !

 

[zoidberg]

Here's the 'Mappa Mundane' from Memory-Map. I've highlighted the areas of less than 5m. CD - which surprised me somewhat. I'd been past quite close on several occasions.....

Lok at that cheeky little 'outlier' boogr off to the east another 1000 feet.

There are Pinnacle Rocks in all sorts of inconvenient places, here and elsewhere. One very steep and pointy example was discovered just a few years ago right in the middle of the entrance to Milford Haven - exactly where the VLCC and gas tankers needed to go.

 

[Sybarite]

This thread got me to thinking about which boat had the deepest draft. It was Seawise Giant which had a laden draft of 81' and a laden displacement of 657000 tons. It could not be used in the English Channel.

 

[Stemar]

This thread got me to thinking about which boat had the deepest draft. It was Seawise Giant which had a laden draft of 81' and a laden displacement of 657000 tons. It could not be used in the English Channel.

There must be a lot of places it couldn't be used. According to Wikipedia, it had an interesting history, including being refused by the company that commissioned it, being enlarges still further, then being sunk during the Iran-Iraq war and then salvaged and put to work again.

According to its captain, S. K. Mohan, the ship could reach up to 16.5 knots (30.6 km/h) in good weather. It took 9 km (5 1⁄2 mi) for the ship to stop from that speed, and the turning circle in clear weather was about 3 km (2 mi). "It's OK, skipper, we're stand-on vessel, steam gives way to sail"