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Search took 0.00 seconds. Search: Posts Made By: David M
Forum: Challenges 10-08-2008, 08:48
Replies: 167
Views: 18,490
Posted By David M
There are a few places on the SF Bay where you...

There are a few places on the SF Bay where you can get out from behind a wind shadow like Alcatraz or Angel Island and the wind can go from a few knots to 35 knots in a matter of less than a minute. ...
Forum: Challenges 10-08-2008, 08:38
Replies: 167
Views: 18,490
Posted By David M
That is correct. I was looking for loxodromic...

That is correct. I was looking for loxodromic curve or loxodrome for the answer but rhumb line is also a technically correct answer. :)

From Wikipedia:
"In navigation...
Forum: Challenges 09-08-2008, 09:40
Replies: 167
Views: 18,490
Posted By David M
Wotname, You got the second question correct. ...

Wotname,
You got the second question correct. A loxodromic curve. Congrats! :)
Forum: Challenges 08-08-2008, 20:25
Replies: 167
Views: 18,490
Posted By David M
Wotname gets credit for answering the first...

Wotname gets credit for answering the first question...congrats!

The second question though is still unanswered. Do you know the answer Pelagic?
Forum: Challenges 08-08-2008, 20:22
Replies: 167
Views: 18,490
Posted By David M
Kai Nui did indeed make an excellent point of...

Kai Nui did indeed make an excellent point of illustrating the importance of knowing how to do vectors. I just needed one more piece information in order to do one. I was given the boats speed...
Forum: Challenges 08-08-2008, 14:35
Replies: 167
Views: 18,490
Posted By David M
Ok, I guess I am next. Lets do a...

Ok, I guess I am next.

Lets do a hypothetical question. If the Earth had no land and you started sailing a course of 080 degrees True from 10 north at any longitude, and stayed on that course...
Forum: Challenges 08-08-2008, 14:30
Replies: 167
Views: 18,490
Posted By David M
I had to know set and drift for my license and...

I had to know set and drift for my license and use vectors to renew my radar endorsement. I agree though, I think its good to practice the old stuff occasionally because of the what if's of boating.
Forum: Challenges 08-08-2008, 13:05
Replies: 167
Views: 18,490
Posted By David M
Sitting at home here today, I don't have a chart...

Sitting at home here today, I don't have a chart in front of me. So I cheated and went to Google Earth. Using my eyeballs only, it looks like a course of very roughly around 200 degrees true and 27...
Forum: Challenges 08-08-2008, 12:21
Replies: 167
Views: 18,490
Posted By David M
I'm not sure I understand because a cruise ship...

I'm not sure I understand because a cruise ship would sail a great circle route which would take the ship the least amount of time and cost the least in fuel etc. This would mean a heading that...
Forum: Challenges 08-08-2008, 12:03
Replies: 167
Views: 18,490
Posted By David M
A straight (as the crow flies) route and quickest...

A straight (as the crow flies) route and quickest route would be a great circle route which means you would change course as you go. Or do you mean a curved route with a constant heading as seen on...
Forum: Challenges 08-08-2008, 11:56
Replies: 167
Views: 18,490
Posted By David M
That's great Kai Nui....you really did find one....

That's great Kai Nui....you really did find one. :D
Forum: Challenges 08-08-2008, 11:10
Replies: 167
Views: 18,490
Posted By David M
...or some relative bearing grease, a metric...

...or some relative bearing grease, a metric crescent wrench, the third leg to the deviation table, checkered paint, a bacon stretcher or 100 feet of waterline. :)
Forum: Challenges 08-08-2008, 10:51
Replies: 167
Views: 18,490
Posted By David M
A wrench is enough to do that. :)

A wrench is enough to do that. :)
Forum: Challenges 08-08-2008, 10:33
Replies: 167
Views: 18,490
Posted By David M
Check to see if the lubbers line is parallel to...

Check to see if the lubbers line is parallel to the boats longitudinal line. Check that all the compensating magnets are there. Swing the compass slowly looking for any places where the card...
Forum: Challenges 06-08-2008, 18:15
Replies: 167
Views: 18,490
Posted By David M
Were you at a very low tide where you did not...

Were you at a very low tide where you did not have enough depth to get out of your slip?
Forum: Challenges 03-08-2008, 18:26
Replies: 167
Views: 18,490
Posted By David M
Zach, Its all celestial navigation and it is...

Zach,
Its all celestial navigation and it is cool stuff to learn. Some say it is worthless knowledge, but I disagree.
Forum: Challenges 03-08-2008, 17:52
Replies: 167
Views: 18,490
Posted By David M
Did the Nautical Almanac burn to ashes or not? :)...

Did the Nautical Almanac burn to ashes or not? :)

During midday, you do a LAN. During LAN, the sun will either be north or south depending on your hemisphere and perhaps also the time of year...
Forum: Challenges 03-08-2008, 13:06
Replies: 167
Views: 18,490
Posted By David M
LOL Pelagic :cheers:

LOL Pelagic
:cheers:
Forum: Challenges 03-08-2008, 12:31
Replies: 167
Views: 18,490
Posted By David M
Good story Zach...and detailed! As far as...

Good story Zach...and detailed!

As far as the starboard engine not shifting correctly, go back to the tranny and see if when you shift, the shift cable pushes the shift lever into reverse. If...
Forum: Challenges 03-08-2008, 10:11
Replies: 167
Views: 18,490
Posted By David M
Hah...I'm guessing Zach got it. A kinked hose! ...

Hah...I'm guessing Zach got it. A kinked hose! Its really obvious when you think about it.
Forum: Challenges 03-08-2008, 09:55
Replies: 167
Views: 18,490
Posted By David M
Something was partially clogging your...

Something was partially clogging your exhaust...something biological like some bivalves or barnacles living in there?
Forum: Challenges 02-08-2008, 13:59
Replies: 167
Views: 18,490
Posted By David M
Raw water impeller is going bad? Got some rust in...

Raw water impeller is going bad? Got some rust in the engine riser partially clogging it? Something partially blocking the exhaust like a stuck flapper valve? Seacock is not all the way open? ...
Forum: Challenges 02-08-2008, 12:15
Replies: 167
Views: 18,490
Posted By David M
Not knowing cutter rigs very well, let me take a...

Not knowing cutter rigs very well, let me take a stab at it. You drop all your sails except for the main. You turn the boat upwind about two or three boat lengths away from the slip. The turning of...
Forum: Challenges 01-08-2008, 13:57
Replies: 167
Views: 18,490
Posted By David M
Agreed, anyone can throw out a question. Yes,...

Agreed, anyone can throw out a question. Yes, lets hear some mechanical or electrical questions. I bet Chief Engineer, Never Monday or some of you other "gearheads" could come up with some good...
Forum: Challenges 01-08-2008, 12:32
Replies: 167
Views: 18,490
Posted By David M
Pelagic....you pretty much nailed it. So I am...

Pelagic....you pretty much nailed it. So I am calling you the winner.

Just a couple very minor points. It's an Acoustic Doppler Current Profiler. This device measures the velocity and direction...
Showing results 1 to 25 of 32
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