First Trip Out in the Solent

[Gludy]

Yes that is the one.

I was warned about that and hence thought that was what was being talked about.

 

[tome]

Yes, that's the one - Horse Sand Fort

A course due W from the West Pole as you leave Chichester Harbour will take you within spitting distance of the gap. You'll pass about 2 cables south of the isolated danger mark off Langstone (Rowan wreck - 2 balls) which tells you you're on course and a mile or so to go. If you can see a gps lat then 50d 46m is a handy line to follow

Don't attempt the gap transit at more than 5 knots with viz less than 10m - hee hee

The gap's a 3 legged concrete 'dolphin' to port and a green post to stbd

 

[tome]

[ QUOTE ]
I reckon with your draft you can probably get in/out about 2 hours either side of HW

[/ QUOTE ]

Noo noo noo. With a draft of 1.8m that's going to catch a prop on the sill sooner or later. Say 1 hour max

 

[Gludy]

Tome
That is one hour either side?

Does the roman numberal gauge give feet above the cill?

 

[fireball]

Er .. yes ... especially if it isnt a high high tide ... not got them with me, but www.chimet.co.uk is showing around 4.6m for this mornings high, should increase for the weekend I think ?? ... pretty handy to check if you've got mobile internet and want to check the actual height of tide ....!

 

[fireball]

Yes

Yes ... /forums/images/graemlins/smile.gif

 

[Gludy]

yes I have printed out the tidal curves - its just realting that to Emsworth that I am trying to do.

has anyone got the height above datum of the cill at Emsworth?

 

[fireball]

2.4m

 

[tome]

Yes, 1 hour either side and numerals are feet above cill so VII is 7 ft= 1.8m = your draft. You really need to see VII submerged not just showing and go through in neutral. There are 2 exits, BTW

Should I offer quick trip as pilot and guide out to the Solent Saturday? If so could you drop me Portsmouth en-route? Have a rare chance to enjoy Sat evening with my dearest which I'm not going to miss. It's my turn to talk!

 

[Gludy]

Thanks for the height - can now relate it to the Chichester Harbour curves or the Northney curves - which is best?

Thanks for the offer, I have no problem getting out once past the cill, its a well buoyed channel and I have all the info. However, if you want a ride to Portsmouth then it would be a good way for me to do a quick trip into there with a pilot on board and head straight out ...... I will PM you.

 

[Gludy]

Wit the cill at 2.4m

The actual draft of the boat is 1.7m although I do not trust that and call it 1.8 m.

Tides on Saturday
Northney 13.40 4.5m leaving 2.1m over cill
Chischester harbour entrance 13.20 4.7m leaving 2.3m over cill

Sunday
Northney 13.20 4.7 leaving 2.3m over cill
Chichester harbour entrance 14:00 4.6 leaving 2.2m over cill.

The question is how does Emsworth relate to these to tidal heights?

 

[fireball]

Emsworth is closer to Northney ... but I'm not sure where your getting your primary data, perhaps you could confirm...

From my Reeds:
Portsmouth HW On Sat is 13:15UT @ 4.4 LW 0.9
Portsmouth HW On Sun is 13:45UT @ 4.4 LW 1.0

Secondary port data (from Portsmouth Standard Port)
<font class="small">Code:</font><hr /><pre>
HW Times
0500 1000
1700 2200
Chichester Harbour Entrance
-0010 +0005
Northney
+0010 +0015
</pre><hr />


Tides being ~1330 so your ~ 1/2way between 1000 and 1700 that would make:

ChiHarbour entrance HW Sat 13:15UT -3 = 13:12UT
ChiHarbour entrance HW Sun 13:45UT -3 = 13:42UT

Northney HW Sat 13:15UT + 3 = 13:18UT
Northney HW Sun 13:45UT + 3 = 13:48UT

The height differences are +0.2 for CH entrance for HW springs and neaps, +0.1 & +0.0 for MLWS & MLWN
The height differences are +0.2 for Northney for HW springs and 0.0 for neaps, -0.3 & -0.2 for MLWS & MLWN

Northney is a couple of miles north of Chichester harbour entrance, but is also affected by Langstone harbour, as Northney is just round the corner from Emsworth I'd use Northney as a closer fit. In practice the differences are so small I wouldn't (generally) bother with interpolating.

 

[rickp]

[ QUOTE ]

Northney HW Sat 13:15UT + 3 = 13:18UT
Northney HW Sun 13:45UT + 3 = 13:48UT


[/ QUOTE ]

Different tidal curves probably. Belfield says:

Northney HW Sat 13:38 4.5m
Northney HW Sun 14:10 4.4m

Rick

 

[Gludy]

I took my tidal data from Neptune Tidal plotter - it has always been very accurate for me and gives the secondry port of Northney and its tidal curve straight off.

 

[zeros]

Speak to emsworth yacht harbour they have tide tables with the height of water over the cill next to it. They could fax you a copy. i have't mine with me or I would. Tarquin should be able to give you the information?

 

[Gludy]

Thank you for the info.

 

[fireball]

Interesting to see such large discrepancies ...

IMO the best way is still to look at the Cill gauge ... ok for going out, a bit more tricky comming back in !

 

[Gludy]

Wit anticpation going out - with anticpation, fear and dread coming back!! /forums/images/graemlins/laugh.gif

 

[fireball]

Just give yourself enough clearance ... you'll be fine ...

 

[Gludy]

I am only joking - I never let such things get to me - I can always reverse back and return to berth.

I brought Drumbeat in without a problem.