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-   -   Best stateroom for someone concerned about motion? (http://www.disboards.com/showthread.php?t=3040922)

MrShiny 01-03-2013 04:14 PM

Best stateroom for someone concerned about motion?
 
I am trying to get my then-70 year old mom on a 2014 cruise. It'll be our 25th Anniversary and their 50th that year.

She had a bout with vertigo after a trip to Florida several years ago. Although this had nothing to do with motion per se (caused by an infection damaging inner ear), she has never cruised and is worried about the motion. She has no history of motion sickness at all - she'll even do an occasional roller coaster.

So I'm thinking a 3 night cruise, since it's in port the majority of the waking hours. I'm guessing an inside stateroom would be best.

Other than that, which staterooms would minimize the feeling of motion? We've cruised several times and know it isn't that bad at all (although one night in Remy skirting a tropical storm was very interesting!).

Thanks!

NCConch 01-03-2013 04:24 PM

Conventional wisdom would say being lower and as close to the middle of the ship. I read somewhere that inside rooms are better than exterior cabins. I have also read that the first night has the most motion.

PrincessShmoo 01-03-2013 04:30 PM

Quote:

Originally Posted by NCConch (Post 47071149)
Conventional wisdom would say being lower and as close to the middle of the ship. I read somewhere that inside rooms are better than exterior cabins. I have also read that the first night has the most motion.

I agree lower and midship is best. However, I disagree with inside vs ocean view (at least). Motion sickness comes from your inner ear not agreeing with what you eye sees. In an inside room, you will feel motion, but your eye says "I shouldn't be moving". With an oceanview (or verandah) you can look out to the horizon and see that you are moving. Fresh air helps also.

:cutie:

DarthTod 01-03-2013 04:45 PM

Back in the day when I was in the navy, and a boot would get seasick his first time at sea, we would send him aft and out onto the flight deck if we liked him to help him recover and adjust (this was a lower, frigate flight deck, not a high carrier flight deck). But if we were feeling mischievous, it was forward into the bosun's locker, an interior space under the bow. Oh and then proceed to eat sardines in front of him, that was what always sent them over the edge.

So that's my advice, lower and midship to aft, and outside, view at least, verandah better for the fresh air.

super mike b 01-03-2013 06:28 PM

Quote:

Originally Posted by DarthTod (Post 47071381)
.....and then proceed to eat sardines in front of him, that was what always sent them over the edge.

I think that would do most of us in on calm seas! :duck:

cixel_SID 01-04-2013 09:18 AM

Naval Architecture - Ship Motions
 
Here's the simplified view of a former naval architect (an engineer who designs ships) regarding ship motions (trying my best to avoid engineering jargon):

The motion of the ship is looked at as being a combination of three linear components (surge, heave, sway) and three rotational components (pitch, yaw, roll) (see definitions below). The center of motion for all six of these components is the center of gravity of the ship. Assuming that the ship is a rigid body and doesn't significantly flex (not precisely true but it's OK for this discussion) the three linear motions act equally at all locations on the ship. That is, the ship heaves (up and down) as though you held a piece of lumber in your hand and moved it vertically up and down ... the entire piece of lumber moves an equal amount vertically regardless of your location on the lumber.

However, the rotational motions, which are also centered at the ship's center of gravity, are characterized by increasing movement the further you are located from the center of that rotation. The further from the center of gravity, the more you feel that motion. Think of a carousel ... the further from the center the faster you are moving. Now if the carousel were designed to frequently reverse direction you can imagine how much more that would affect you the further from the center you were located. If you don't like that comparison, think of a see-saw ... near the pivot point you don't move very much; the further away from the center, the more you move up and down.

Now, the motion that you feel at any point on the ship is the combination of all six motions. Again, the three linear motions are felt equally throughout the ship. But, the three rotational motions (pitch, yaw, roll) are all felt more the farther that you are from the center of gravity. So, the lowest total motion is felt at the ship's center of gravity and the combined motion increases with increasing distance from the center of gravity.

Although the center of gravity can vary somewhat, for the purposes of this discussion you can assume with pretty good certainty that the center of gravity is located as follows:

fore/aft location = about midship
port/starboard location = on ship's centerline
vertical location = several feet BELOW the waterline

With this information, and the understanding that nearly all ship passenger staterooms are located above the ship's waterline, we can deduce that the lowest ship motions are felt on the lowest possible passenger stateroom deck, closest to midship and nearest to the ship's centerline. This would indicate the advantage of the inside cabin for lower motions.

However, the way that any individual responds to those motions can vary greatly between people, and as a previous poster noted, some feel better in an outside cabin because they can focus on the horizon and minimize the confusing messages that their eyes and ears independently send to their brain.

I hope that this helps somebody by providing the technical reasoning that leads to the "conventional wisdom" which was provided by a previous poster.


Some definitions:
Linear motion: Movement ALONG an axis
Surge: A fore and aft motion along the longitudinal axis
Sway: A port and starboard motion along the athwartship axis
Heave: A vertical (up and down) motion along the vertical axis

Rotational motion: Movement AROUND an axis
Pitch: A rotational motion around the athwartship (port and starboard) axis
Roll: A rotational motion around the ships longitudinal (fore and aft) axis
Yaw: A rotational motion around the ships vertical axis

sayhello 01-04-2013 11:25 AM

I have had the best luck with the lower decks (Deck 2 on most ships) and midship window. Definitely the least movement that I've experienced.

Sayhello

momof3lovebugs 11-17-2013 06:58 PM

Quote:

Originally Posted by cixel_SID (Post 47077663)
Here's the simplified view of a former naval architect (an engineer who designs ships) regarding ship motions (trying my best to avoid engineering jargon):

The motion of the ship is looked at as being a combination of three linear components (surge, heave, sway) and three rotational components (pitch, yaw, roll) (see definitions below). The center of motion for all six of these components is the center of gravity of the ship. Assuming that the ship is a rigid body and doesn't significantly flex (not precisely true but it's OK for this discussion) the three linear motions act equally at all locations on the ship. That is, the ship heaves (up and down) as though you held a piece of lumber in your hand and moved it vertically up and down ... the entire piece of lumber moves an equal amount vertically regardless of your location on the lumber.

However, the rotational motions, which are also centered at the ship's center of gravity, are characterized by increasing movement the further you are located from the center of that rotation. The further from the center of gravity, the more you feel that motion. Think of a carousel ... the further from the center the faster you are moving. Now if the carousel were designed to frequently reverse direction you can imagine how much more that would affect you the further from the center you were located. If you don't like that comparison, think of a see-saw ... near the pivot point you don't move very much; the further away from the center, the more you move up and down.

Now, the motion that you feel at any point on the ship is the combination of all six motions. Again, the three linear motions are felt equally throughout the ship. But, the three rotational motions (pitch, yaw, roll) are all felt more the farther that you are from the center of gravity. So, the lowest total motion is felt at the ship's center of gravity and the combined motion increases with increasing distance from the center of gravity.

Although the center of gravity can vary somewhat, for the purposes of this discussion you can assume with pretty good certainty that the center of gravity is located as follows:

fore/aft location = about midship
port/starboard location = on ship's centerline
vertical location = several feet BELOW the waterline

With this information, and the understanding that nearly all ship passenger staterooms are located above the ship's waterline, we can deduce that the lowest ship motions are felt on the lowest possible passenger stateroom deck, closest to midship and nearest to the ship's centerline. This would indicate the advantage of the inside cabin for lower motions.

However, the way that any individual responds to those motions can vary greatly between people, and as a previous poster noted, some feel better in an outside cabin because they can focus on the horizon and minimize the confusing messages that their eyes and ears independently send to their brain.

I hope that this helps somebody by providing the technical reasoning that leads to the "conventional wisdom" which was provided by a previous poster.


Some definitions:
Linear motion: Movement ALONG an axis
Surge: A fore and aft motion along the longitudinal axis
Sway: A port and starboard motion along the athwartship axis
Heave: A vertical (up and down) motion along the vertical axis

Rotational motion: Movement AROUND an axis
Pitch: A rotational motion around the athwartship (port and starboard) axis
Roll: A rotational motion around the ships longitudinal (fore and aft) axis
Yaw: A rotational motion around the ships vertical axis

this is brilliant! I love this explanation and it will certainly help me choose our cabin!!:thumbsup2


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