Commercial Vessel Anchor Survey. Video # 129

  Рет қаралды 2,758

SV Panope

SV Panope

2 жыл бұрын

This video is a continuation of a simple tally of anchor types that was conducted at the Port of Port Townsend Marina and Shipyard. Previously, in video #122, Pleasure boat anchors were counted. Now that the local commercial fishing fleet has returned to port, those vessels have been included.
I find it fascinating that not one vessel has a "top performing", non-pivoting, modern anchor.

Пікірлер: 25
@caskillet
@caskillet 2 жыл бұрын
I am a commercial troller (47' steel hull) in Alaska, and I see many of my friend's boats in this video. You are correct, we are creatures of habit in the anchoring regard, but for good reason. The Fjorford and a 5-10 fathoms of heavy chain is the gold standard in our fleet (I have a #8 on my bow roller, attached to 10 fathoms of 1/2" chain, followed by 50 fathoms of 3/8" chain, followed by 50 fathoms of 5/8" Samon Superstrong double braid). My backup anchor is a homemade Northill as you see on a few boats in your video. It is terribly inconvenient to deal with, and stays lashed on top of the wheelhouse with 100 Fathoms of line attached, ready for emergency deployment. I've never needed it. Very often, we either anchor on rocky bottoms in small anchorages, and with very little swing room if the fishing is good (meaning there can be a lot of boats in a small anchorage area), or on small ledges we can just get our hook to stick on. Most anchorages are fairly well protected, else we just drive further offshore and drift overnight. Our rocky bottom anchorages are very compatible with the Fjorford, but I have found the Fjorford lacking in silty mud. During a sustained 50 knot, 70 knot gust event in Kanga Bay, I drug repeatedly until I finally reset the hook over a rock hump in the bay and held fast. The other time was in a 40 knot sustained event in Torch Bay, a notoriously bad bottom for our fleet, and drug all night long, necessitating several resets. I have considered having the fluke modification done to my anchor (Kolstrand, ie., Intergrity Machining in Marysville, WA, does it for our fleet) but have talked with several old salts who feel the additional holding in silt and sand isn't worth the holding power in rocks that is given up. I anchor between 75 and 150 times a year on average, and trust my and my crew's life to the Fjorford up here. I know the conditions where the Fjorford isn't optimal, and try to avoid those very few situations that play to its weaknesses. When caught, as I have been, I just set anchor alarms and nap lightly until the tempest is over. Choosing another anchor means changing what works well now and has worked for generations. So why change?
@flygoodwin
@flygoodwin 2 жыл бұрын
Thank you very very much for sharing your first hand experience. I will "pin" your comment to the top of the list.
@caskillet
@caskillet 2 жыл бұрын
@@flygoodwin I find your videos very interesting and informative, please keep it up. I do very much like Panope's arrangement, as you have a time-tested rock grabber in the Forfjord, and what I assume is a superior soft-bottom holder that is more practical in more areas of the Puget Sound. If I had a dual anchor set-up on my bow, I would do the same.
@surfingjim8321
@surfingjim8321 10 ай бұрын
Thanks for this video. I've been wondering about the Northill anchors.
@VibratingDolphinNow
@VibratingDolphinNow 2 жыл бұрын
Awesome stuff. Shocked at the number of wooden commercial vessels out there in the PNW! The east coast here is mostly FG commercial boats with very large-fluked Danforth anchors for the mostly sandy bottoms around here. One reason to paint the anchors along with the boat is to prevent rust streaking from an unpainted anchor from marring your nice new paint job!
@flygoodwin
@flygoodwin 2 жыл бұрын
Yes, wooden boats are still very much a "thing" around here. We have numerous wooden boat shipwrights, with more being churned out by the Northwest School of Wooden Boatbuilding, all the time. Some of these fishing boats are close 100 years old and in excellent condition.
@jonathanflatman
@jonathanflatman 2 жыл бұрын
Perhaps the stockless anchors are still popular on the older and larger craft because a very heavy anchor with comparatively low holding power might ideal for drudging (holding one anchor just in contact with seabed to reduce swinging on the main anchor) and for control when going astern before bowthrusters became the norm. As a child, I remember seeing cargo ships coming up our local river astern while dragging the bow anchor at a near vertical angle.
@braithmiller
@braithmiller 2 жыл бұрын
I see you focusing on power vessels in commercial sizes. They do seem to have different needs and anchorages than most SV. SV seem the most interested in changing with an expectation of improving. Trial by anchoring out regardless of storms is most telling. More than a few undersized lunch hook mains on vessels I've wondered they don't anchor out or cruise in hard conditions and have plenty $ to tie in marinas. A few I talked to had no expectation of riding any storm out.
@rowanperry2228
@rowanperry2228 2 жыл бұрын
Could you make more videos about Panope?
@flygoodwin
@flygoodwin 2 жыл бұрын
At some point, I will make the video "Rebuilding Panope - Part 3". In case you missed Parts 1 and 2, here are the links: kzfaq.info/get/bejne/qM-IgbZynNORkp8.html kzfaq.info/get/bejne/n7Jmja6cyrnbkYU.html Here are some sailing shots: kzfaq.info/get/bejne/nKqDg6Wr29zbook.html
@swamprobin3291
@swamprobin3291 2 жыл бұрын
"I've never tested one of these (stockless) anchors, but I bet they are much like the Forfjord in that they produce perhaps very, very low holding power compared to modern anchors." - Steve Goodwin "The Navy stockless anchor has less holding power than an old fashioned anchor of the same weight and much less than today's lightweight anchors. ... The stockless anchor is used today only on large boats, but it is universal on ships where ease of handling and stowing by mechanical means is more important than anchor weight " - Earl R. Hinz In a light weight sailboat, I care a lot about weight to holding power ratio, which Steve covers in his videos. But then, I can muscle my anchors around if I need to. The need to manage an anchor without ever touching it, is one I don't think a lot about.
@peterheiberg566
@peterheiberg566 2 жыл бұрын
Those south winds that we’re all complaining about here in the PNW would sure be good for getting some real world numbers so we knew what sort of forces the wind and waves actually produce.
@flygoodwin
@flygoodwin 2 жыл бұрын
With a bit of luck, Panope might go into the water soon, just for that purpose. I did put a load cell on a large sailing vessel (in the marina) during a 20 kt wind. We are waiting for a stronger (wind) day to finish up that study.
@braithmiller
@braithmiller 2 жыл бұрын
It would be academically interesting to know 🤔 my SV is pulling in gales with high wave action. 45# CQR on 3/8 chain is certainly not enough to keep from dragging. 100# Danforth in series on another chan is temporary working fix.
@SylverStone-pd-4501
@SylverStone-pd-4501 2 жыл бұрын
@@braithmiller That CQR is buried deep, and the Danforth should be as well at this point. Where you're anchored, you're not getting enough westerly to do much to the Danforth, (I don't think it's even rotating).
@braithmiller
@braithmiller 2 жыл бұрын
@@SylverStone-pd-4501 agreed: I think only the CQR has done any movement. Cris had made comment against two anchors, regarding them twisting around each other, rather I think the series arrangement is acceptable. The bottom is certainly already littered there with entanglement materials.
@braithmiller
@braithmiller 2 жыл бұрын
Possible thoughts on snubbers? Specifically regarding reducing the total shock load on anchors rather than taking the load off of a windlass. I am not so convinced of how useful they are in comparison to the catenary weight of my all chain rode. Recently helped a larger vessel set up a more complicated system than I would tend to want. Much research involved I still have more questions of value without load testing comparison.
@SylverStone-pd-4501
@SylverStone-pd-4501 2 жыл бұрын
As soon as you run out of catenary, (likely in waves over 2' with light chain) your chain turns into a steel bar and the wave action will ratchet the anchor out of the bottom. (wave pulls your vessel up and back, something has to give, a vessel can pull upwards with substantially more force due to waves than they usually pull due to wind) Snubbers put stretch in the system to mitigate that. Most vessels use chain + rode, so they have a lot.of stretch to begin with. a kellet basically works on the same principle (increase catenary) by adding weight. 30' of 1/2" triple strand is good for about 900# of shock loading, so two of those work excellent for most vessels. Big commercial level vessels don't use them often, as multi hundreds of lb anchors and hundreds of feet of chain that's a couple lbs per link, is a different catenary situation than a mid sized vessel. Best practical demonstration is towing a vehicle. A 20' strap is far, far superior, than a 20' chain, and as soon as you try it, the why of it is extremely obvious.
@braithmiller
@braithmiller 2 жыл бұрын
@@SylverStone-pd-4501 Towing 20-30’ and catenary on 150’+ of all chain in 40’ not being equal examples. I would just like the comparative data. I tow with chain using low speed heavy equipment. Blue steel fishing line 5/8” last time I made a recovery setup. I can’t count how many commercially made tow straps I have snapped.
@flygoodwin
@flygoodwin 2 жыл бұрын
Braith, generally speaking, the amount of shock absorption that an "all chain" rode provides is dependent on water depth. In shallow water (say, less than 10 feet) a nylon snubber is probably a good idea anytime. In medium depth (say 30 feet) chain catenary will offer good shock absorption up to about 25 kts wind. In deep water (say, 100 feet) catenary will still be effective in quite strong winds (I'll guess up to 50 knots. Note: The above figures are generalizations. Factors such as size of chain and how the boat reacts to wind/waves will vary results. In case you missed it, check out my "Anchor Chain Catenary" video: kzfaq.info/get/bejne/m52fZpOZtNzZeJ8.html
@mm-zw1zc
@mm-zw1zc 2 жыл бұрын
Interesting. I wonder if the reason these vessels use older and more robust anchors is because they have a different kind of anchoring need. I doubt they spend a lot of overnights at anchor, or times where they want a set for a good strong blow. In those cases they would be more likely to tie up at the harbor, or would be motoring around into the weather. Instead, I suspect their needs are more of a temporary anchoring where they are near to controls if they ever did slip out of place. An interesting comparison would be a survey of boats that spend most of their time at anchor - such as full time cruisers. Not sure how to get that data, however.
@caskillet
@caskillet 2 жыл бұрын
We anchor very often. But it is not to just hang out. It's mostly just to get off the fishing grounds for a few hours and sleep. It is rare that there is a commercially viable population of fish within an easy run of a harbor. After sleeping for a bit, we get up and get back at it. As a percentage of time anchored vs underway, we spend very little compared to cruisers. In terms of the frequency we need to drop the hook and make sure it holds, coastwise trollers in Alaska exceed most, if not all, cruisers.
@Hoopaball
@Hoopaball 2 жыл бұрын
Maaaan
@roberthorsford4266
@roberthorsford4266 2 жыл бұрын
Hi Steve, have you seen the video of the Fleming motor boat with a bent Ultra shank? See here: kzfaq.info/get/bejne/lbR-hMdoqLKsiIk.html specifically have a look at 5:56 to see a completely failed shank on the Ultra.
@flygoodwin
@flygoodwin 2 жыл бұрын
I had not seen that video, Robert. Thanks for the link. It was disheartening to see the Ultra shank so completely "kinked". It appears that once the shank collapses, strength will be mostly gone. By comparison, the anchors with solid shanks should retain most of their strength even when deformed.
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