"The Captains Master" wrote in message

| When you do calculations for every bottom contour and its effect on
| current for every 100 metres of your trip.....yep, tonnes of paper.

You're reading way to much into my inquiry about bottom contours.... like
Bob you probably think you have to actually dive down and map it... that was
just too funny!

Don't you verify if the charted depth conforms with your depth sounder
readings at regular intervals Oz???

CM

My depth sounder only reads to 500'. At 1.5 miles offshore I'm in over
500' of water depth. How can I chart the bottom contours?

Capt. Mooron wrote:
"The Captains Master" wrote in message

| When you do calculations for every bottom contour and its effect on
| current for every 100 metres of your trip.....yep, tonnes of paper.

You're reading way to much into my inquiry about bottom contours.... like
Bob you probably think you have to actually dive down and map it... that was
just too funny!

Don't you verify if the charted depth conforms with your depth sounder
readings at regular intervals Oz???

CM

Draw a straight line, label it 500' then draw a hideous sea monster under
it.
Scout

"Kelton Joyner" wrote
At 1.5 miles offshore I'm in over 500' of water depth.
How can I chart the bottom contours?

"Kelton Joyner" wrote "Dear Capt. Mooron" with this
lament:

Dear Capt. Mooron

| My depth sounder only reads to 500'. At 1.5 miles offshore I'm in over
| 500' of water depth. How can I chart the bottom contours?
signed: Over My Head

Dear Over My Head,
This is a common problem for coastal sounders used in deep water. I suggest
you upgrade to a larger more powerful professional grade unit. If this
proves not practical just use your advanced knowledge of seastate to confirm
your multiple GPS, Sextant and Dead Reckoning Plots. Once you return to the
continental shelf your cheapo coastal unit will once again provide
confirmation of correct seafloor contours. I have toyed with the idea of
using powerful underwater speakers and a sound system approaching the power
generated by the unit currently on Bob's boat "Alien"... this could be
utilized to scramble the sonar array on passing subs. Once they surface to
investigate the cause you can inquire as to the actual depths as they board
your vessel. Good Luck and Fair Winds.

Capt. Mooron

If you are just sailing along and not on a Cousteau expedition or =
anything, why would you care what the depth was beyond 500 feet? It's =
not like if you dropped anything OB you could retrieve it from that =
depth, or that you'd actually want to visit with any of the denizens who =
live there. It's not like you'd actually have a keel that would bong on =
anything that deep. As long as your depth sounder was working well so =
that when you got less than 500 feet it would start working again, =
wouldn't that be sufficient? Maybe you could jury rig the thing so that =
an alarm would go off when you hit 500 feet again...heaven help you =
would not want to miss going into the shallows like that. Or maybe you =
like anchoring at the depth? You must have an awfully big anchor locker =
to hold that much chain and rode. Don't you get tired hauling it all =
back up again? And aren't you afraid that the swing on the rode will =
put you into the shipping lanes? Good Gadfry, I;ve turned into =
Gilligan....

--=20
katysails
s/v Chanteuse
Kirie Elite 32
http://katysails.tripod.com

"Women and cats will do as they please, and men and dogs should relax
and get used to the idea." - Robert A. Heinlein

"Capt. Mooron" wrote in message ...
"Kelton Joyner" wrote "Dear Capt. Mooron" with this
lament:

Dear Capt. Mooron

| My depth sounder only reads to 500'. At 1.5 miles offshore I'm in over
| 500' of water depth. How can I chart the bottom contours?
signed: Over My Head

Dear Over My Head,
This is a common problem for coastal sounders used in deep water. I suggest
you upgrade to a larger more powerful professional grade unit.

A Simrad EK60 with a 12KHz transducer would do it nicely. Somehow I
think there'd be a small problem fitting one to the average yacht.

Peter Wiley

"Peter Wiley" wrote in message

| A Simrad EK60 with a 12KHz transducer would do it nicely. Somehow I
| think there'd be a small problem fitting one to the average yacht.

My old Canadian Tire Fish Finder had no problems with depths to 800 feet. A
common occurrence in Great Slave Lake. It cost $139.00 Cdn......

CM

How can I chart the bottom contours?


Buy a sonar....

--=20
katysails
s/v Chanteuse
Kirie Elite 32
http://katysails.tripod.com

"Women and cats will do as they please, and men and dogs should relax
and get used to the idea." - Robert A. Heinlein

Depth is a very useful navigation tool
Cheers MC

Capt. Mooron wrote:

"The Captains Master" wrote in message

| When you do calculations for every bottom contour and its effect on
| current for every 100 metres of your trip.....yep, tonnes of paper.

You're reading way to much into my inquiry about bottom contours.... like
Bob you probably think you have to actually dive down and map it... that was
just too funny!

Don't you verify if the charted depth conforms with your depth sounder
readings at regular intervals Oz???

CM