[captroynsteph]

What ever happened to swimming from a yacht. Can't exactly do that with two big meat cleavers swinging under the transom. I can't imagine the prop wash would be very helpful with many of the water toys that yachts are carrying these days either.

[Billy1119]

Originally Posted by captroynsteph

What ever happened to swimming from a yacht. Can't exactly do that with two big meat cleavers swinging under the transom. I can't imagine the prop wash would be very helpful with many of the water toys that yachts are carrying these days either.

I agree, it could certainly complicate things! I would suspect when keeping the boat in place, the prop wash would be minimal, just because of the minor adjustments likely necessary. That depends on a lot of factors though... I agree though - I wouldn't want my kids (when I have some) swimming around with those props spinning.

Hey, 100th post!

[Garry Hartshorn]

The basic concept of the system has been around for quite a while I beleve the original system used on oil rig tenders utilised transponders mounted on the oil rigs for the position information. But back to the original question, I do not see that it can be used as a replacement for anchors.

[Billy1119]

Originally Posted by yachtluver

ok, so now what about the kind of anchors. For the small yachts they use some kind of spade looking anchor for sandy bottoms and graveled bottoms.....the mega yachts use the heavy 300-600 KG anchors....what determines what anchor a yacht uses other than size of the yacht..?

Well, you kind of answered your own questions. Other than size, the primary thing that determines the type of anchor is the bottom it will be used in. Some simply hold better than others in certain bottoms. Some would get destroyed in other bottoms - for example - you wouldn't want to use a danforth (works well in sand) in the rocks, as it could get mangled and be difficult to bring up. Not to mention it may not hold well, if it gets hung.

[YachtNews]

A danforth?.. that is the name for the spade looking anchors?

[K1W1]

Hi,

Here is an example of different types of smaller anchors:

http://www.ukdivers.net/boats/anchors.htm

and one for the larger ones

http://www.blueoceantackle.com/hhp_d...pe_anchors.htm

[YachtNews]

Hey, thanks for the links....ur a good help.

[Innomare]

Originally Posted by yachtluver

ok, so now what about the kind of anchors. For the small yachts they use some kind of spade looking anchor for sandy bottoms and graveled bottoms.....the mega yachts use the heavy 300-600 KG anchors....what determines what anchor a yacht uses other than size of the yacht..?

The size of the anchor is based on the equipment number. This number is calculated from a formula taking into account: total displacement (for influence of the currents) and the windage (area of the yacht above the waterline subject to the wind). For the windage, the area as seen from the bow counts twenty times as much as the area seen in profile, which is quite logical.

Every class society has their own tables giving appropriate anchor sizing with regards to the equipment number, taking into account certain reductions (anchor types, number of anchors, service restrictions, etc.). While for ships these rules are practically the same in all class societies, for yachts every class society has their own mind.

For boats < 24 m, there are different rules (CE, e.g.).

PS. Even with gyrocompasses and gps, we still have magnetic compasses all around. I guess it would take forever before a simple and useful system like an anchor would dissapear from ships/boats, even if they were only used in extreme emergencies.

[YachtNews]

Detailed explanation there Innomare.thanks........When they say ' stud linked' that just means that the oval ring has a metal piece in the middle in a horizontal manner? Just making sure what i think is the right thing is the right thing...or wrong

[K1W1]

Hi,

Yes, you are right.

Here is a link that shows a variety of chains and shackles etc asociated with Anchor Chains

http://www.h-lift.com/anchorchain.htm

[YachtNews]

Hey i just remembered about the metal lines that we all saw on Oceanco's Amevi bulb. I think i remembered some person syaing that they were there to protect the bulb from the anchor chain. How comes then....we do not see it on many other bulbed yachts and further more why not on cruiseships or bulbed cargo/containerships. I think this may nullify the purpose of these lines. Are you sure they are not for hydro dynmaics or something to that effect?

[Innomare]

I am quite sure they're not for hydrodynamics. I see them doing more wrong than right in that respect. It's not like on a planing hull where you can have spray strakes because you want the flow to separate from the hull at a certain point. On a bulb, you don't want the flow to separate.

Why some ships don't have them is a tougher one... Maybe because their anchor pockets are further aft. Or because they hardly ever spend time on anchor and don't want the hydrodynamic penalty. Or they have thicker plating in the bulb...

Why do some cars have plastic guard stripes on their doors and others not?...

[YachtNews]

We are not talking about cars Innomare

[Innomare]

Unless they're amphibious of course

[YachtNews]

LoL, alright then, i will let you through on that one then.