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CAT and Snap Roll

Old 01-10-2019, 02:42 PM
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Default CAT and Snap Roll

I have been thinking about a power cat for awhile. Specifically Glacier Bay's 2680. I have read numerous posts and articles about snap roll. I understand it, but I am looking for some real experiences from people.

90% of my fishing is on the drift, should I be concerned?

My current boat is a Grady White Sailfish and the move to the CAT is for the comfort of the rides out and back over the monohull. I fish primarily around and South of Block Island and we see a lot of days in that 2-4 chop.
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Old 01-10-2019, 02:47 PM
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Originally Posted by Reming870 View Post
I have been thinking about a power cat for awhile. Specifically Glacier Bay's 2680. I have read numerous posts and articles about snap roll. I understand it, but I am looking for some real experiences from people.

90% of my fishing is on the drift, should I be concerned?

My current boat is a Grady White Sailfish and the move to the CAT is for the comfort of the rides out and back over the monohull. I fish primarily around and South of Block Island and we see a lot of days in that 2-4 chop.

I operate almost 100% of the time in those same waters and thought I wanted a Glacier Bay for the very same reasons you state and then I looked at GBs. Perhaps your familiar already and OK with the size of the cockpit in the Glacier Bay but I was shocked on how small it was for a 26ft boat. So small IMO it totally turned me off the boat regardless of ride or sea keeping abilities.....
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Old 01-10-2019, 02:56 PM
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Tunnel slap could be an annoying problem for drifting on the boat you are considering.
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Old 01-10-2019, 04:50 PM
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Snap roll has been over stated and beaten to death for years by journo's who typically don't have clue what they are actually talking about.
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Old 01-10-2019, 05:21 PM
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My boat drifts beam to the waves and the snap roll is annoying. I got a drift sock for Christmas and it helped but I think I need a bigger one as it could only change the angle a little bit, which really smoothed out the roll, but couldn't get me completely bow to the waves. I've only tried it once.

My last cat drifted stern to the seas and was crazy stable. I think it will depend on exactly which model you want.

If you plan on drifting in chop a lot, don't get a cat that drifts beam to the seas unless you also get a drift sock or trolling motor so you can control the angle.

The ride and everything else is absolutely worth it, IMO. I will never own another monohull.
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Last edited by scott_gunn; 01-10-2019 at 05:57 PM.
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Old 01-10-2019, 05:31 PM
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Check out eastwardboats.com. Our Horizon 3000 does not do that.
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Old 01-10-2019, 08:23 PM
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Originally Posted by Kerry View Post
Snap roll has been over stated and beaten to death for years by journo's who typically don't have clue what they are actually talking about.
I used to want a GB 2680 until I rode in one back in 2001. I'll never forget how badly the boat bottomed out, the hull sneeze, and the white knuckle snap roll on a drift. The ride was nice until it got rough.
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Old 01-10-2019, 08:39 PM
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Originally Posted by BigShrimpin View Post
I used to want a GB 2680 until I rode in one back in 2001. I'll never forget how badly the boat bottomed out, the hull sneeze, and the white knuckle snap roll on a drift. The ride was nice until it got rough.
My GB experience exactly. A quartering head sea yes, anything else..hellz naw.
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Old 01-10-2019, 08:43 PM
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We looked at a Glacier Bay a while back. For the hull size the interior space seemed extremely cramped.
Ended up with an old 2950 Proline. Lots of fishing space and good cabin space for the size.

Not a cat ride, but we don't go when it's rough anyway.
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Old 01-11-2019, 12:52 AM
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At the end of the day, you're going to have to take a ride in one. I call BS on all the dramatic "white knuckle, snap rolling, hull sneezing" blah blah crap. My old man had a ProKat for years. He couldn't believe the difference in the ride quality. He sold it, got a monohull and now kicks himself for doing that. Just like monohulls, all cats ride a little different. If you find one you like, take it out in some crap and see how you like it.
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Old 01-11-2019, 03:41 AM
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I've been running my Dad's World Cat for a couple of seasons. Drifting for fluke and live lining for striped bass. Although the sensation is different than the mono hull, I wouldn't say there is anything particularly uncomfortable about it.
Never been on a GB but I think the World Cat (27TE) has quite a bit more deck space than most in its class. Just my 2 cents.
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PS. I also fish a 28 Carolina Classic. With her 24 degree hull, she rolls pretty good on the drift when it gets snotty. But sure rides nice on the way home!
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Old 01-11-2019, 04:27 AM
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Most anything drifts to the beam. A cat will be more comfortable than any v of equal size due to it's wider stance. If you want to drift stern to the seas you need a sail or structure at the bow to catch the wind more than the tall sides of a cat.

Or get a trolling motor.
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Old 01-11-2019, 04:27 AM
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"Snap roll" has been beaten to death.

ALL boats roll. How they roll is going to be determined by the shape of the hull. They all start rolling away from an incoming swell, level as it reaches the top, then roll the other way from it as the swell recedes. The roll is damped by more mass, deeper draft, and a lower CG, all providing inertia resisting the external forces of the water.

Deep-V's tends to have more draft and a narrower beam at the waterline than do shallower v-hulls of the same weight, so the "damping" effect is increased. A skiff will tends to track the swell contour with very little damping, and how the cat does it will also include the beam's relation to the wave length - if they are the same, there will be no roll at all in a beam sea, just up and down travel.
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Old 01-11-2019, 04:51 AM
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After reading about this for quite some time in THT the real answer is go for a sea trial - drift with a sea anchor and without. Then decide yourself. No bits and bytes will substitute for real world experience.

re
===
90% of my fishing is on the drift, should I be concerned?
===
Yes...but just as much as any other boat. They also make some wacky stabilizer that some folks use. Magma Rock 'n' Roll Stabilizer System . I don't have one, but some folks like 'em. To me it looks like one more thing to deal with. Bit more here.

re
===
My current boat is a Grady White Sailfish and the move to the CAT is for the comfort of the rides out and back over the monohull.
===
Go out and sea trail one on a nasty day - preferably with an experienced owner. I can force a snap roll; I can equally avoid one. You won't when you start.

That said...I have a GB 2670 and enjoy the heck out of it. Might be the last boat I own (maybe). Wife likes it, all my buddies like it...bought bean bags and have already fallen asleep on the way in. I call it the poor man's yacht.

Break in cruise was in +20 knot winds in some slop.




Last edited by jbdba01; 01-11-2019 at 04:56 AM.
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Old 01-11-2019, 05:09 AM
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Have not experienced snap roll in my cat in two seasons so far.
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Old 01-11-2019, 05:27 AM
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I bought a brand new GB 26 center console in 2001. Sold it within a year. The snap roll and tunnel sneeze was really bad. I think the tunnel sneeze was what pushed me over the edge to sell it. The windshield and my sunglasses would be caked in salt on the regular. Not fun. Every boat is a trade off. That boat would literally fly into a head sea though. That part was simply awesome. One trick I used to do when drifting was to put one engine in reverse at idle speed with the wheel turned all the way. That helped to make the boat drift quartering to the seas.

I also owned a Prowler 25 and that was pretty dry (almost no tunnel sneeze) and had less snap roll than the GB.

Last edited by FishEye; 01-11-2019 at 05:33 AM.
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Old 01-11-2019, 06:47 AM
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Originally Posted by FishEye View Post
I also owned a Prowler 25 and that was pretty dry (almost no tunnel sneeze) and had less snap roll than the GB.
I was going to say look at the Prowler 25 as it isn’t going to have the same characteristics as the GB.
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Old 01-11-2019, 07:10 AM
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Having fished a 26 GB many many times, I find it weird to hear people say that the cockpit is cramped. I have never seen a 26' CC that has as much room behind the helm.
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Old 01-11-2019, 07:19 AM
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I think there are differences in performance characteristics among catamaran hulls just as diverse as among monohulls. Its like saying “ my grady white does ‘this’ so Id watch out for that in the Sea Vee youre looking at”. Ive had 2 catamarans, neither GB 26, and neither had snap roll. In fact my current boat is absolutely the most stable drifting platform Ive been on. Thats not to say it doesnt have other quirks. Its just that each hull even from the same manufacturer, has its own personality, mono or cat. You cant generalize.
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Old 01-11-2019, 07:48 AM
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I have owned both a 2680 and 260. Both were awesome boats for their intended purposes. Every boat type and hull shape is a compromise. The GB 26s excel in slicing through waves like butter, but the rocking can be annoying while drifting beam to. In the hundreds of hours of personally operating both boats both in the Atlantic and in the GOM, I never experienced "Snap Roll" nor did either boat suddenly change directions on me while cutting through large chop. My buddies used to call it "The Magic Carpet" due to how it glides over big wind chop and swells like its not even there. They will safely take you through any conditions you can get yourself into (within reason of course). When the conditions get real snotty (5+ on a 3-4 sec period), it still sucks as it would in most any boat....but you can still make your way through it confidently. They do sneeze, but with the full windshield of the 2680, who cares. Tunnel slap off plane? Yep, but you get used to it. Wet on a choppy day with a stiff cross wind? Yep, but again with the windshield, who cares? And what smooth riding boat isn't? Being stuck behind a windshield is less than ideal at times. I put a 2nd station on top of the hard top on mine....best thing I could have done to it. Perma Trim tabs helped make the engine trim act like trim tabs. I overpowered both of mine, the 260 with twin 300s....ran 64MPH, but anything above 55 was sketchy. Could cruise at 50 all day; however, I usually cruise around 30 as it is much easier on the wallet. Again, the thing that bugged me the most about them was the incessant rocking while drifting or at rest. They rock much faster back and forth compared to a V hull, but not nearly as far. Lower amplitude, higher frequency. Occasionally when the period and direction of the waves align with the distance between sponsons, you end up with one sponson on top of a wave and the other in between waves, that's when the rocking can get intense. Nothing crazy, but watch out for your cooler and tackle box on the deck. Again, pros and cons to all different boat/hull styles. I don't have either boat anymore, not because I didn't like them, but because my needs changed.

Check out the rocking at 2:28 in this video. Pretty typical motion while at rest in a light chop.

Good footage of these boats eating up some chop and swells.
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