Questions tagged [sea]

Questions specific to the sea or oceans

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6
votes
3answers
187 views

Did any lighthouses provide directional navigation signals?

Rather than shining in all directions, lighthouses usually produce a directed beam of light that continuously sweeps in a circle. This allows: the light to be more concentrated and so appear brighter....
5
votes
1answer
315 views

What is this plastic net with a wide middle and bottom that looks like an upside-down flower hanging from a tree?

We recently (July, 2019) went to Bar Harbor, Maine, United States, to visit friends who live on the ocean. My husband took a walk on an established path (he's very serious about Leave No Trace) at the ...
14
votes
4answers
1k views

How to get out through surf in fins?

I got myself some short fins since as a fairly weak swimmer especially in my legs I wanted a bit more confidence and power when swimming in the sea. However one basic problem I've encountered - how ...
15
votes
4answers
4k views

Technique for swimming with fins?

I recently bought some fins... Short, much stiffer than some fins used by divers these are more aimed at surfing. I can feel they make me faster but am struggling with technique. I feel I'm fighting ...
4
votes
1answer
313 views

If you are stranded at sea with a basic set of fishing equipment, how reliable of a food supply are fish?

We have a question about desalinating water while stranded at sea, and another that asks if you can get desalinated water from eating fish. However, even if you could get desalinated water from fish ...
16
votes
3answers
3k views

What’s the best thing to wear on your hands when sea kayaking in very cold weather?

What product or combination of products best protects your hands while kayaking in winter? I’m interested in a system which provides comfort for extended paddling but also the peripheral activities ...
7
votes
3answers
378 views

How do I make and test a radar-reflecting hat?

At significant risk of tin foil hat jokes, I’ve read compelling evidence that a homemade hat incorporating angled and crumpled aluminum foil may slightly increase a kayaker’s visibility on radar — not ...
14
votes
2answers
373 views

What safety equipment should I carry for sea-touring by kayak?

What equipment should I carry in case of emergency on a coastal kayaking trip? I normally do short trips (1 week or less) around the islands of northwest Scotland. I tend to travel solo (sometimes no ...
7
votes
2answers
213 views

What can I do to be more visible to other ships’ radar when traveling in a sea kayak?

I’ve seen small radar reflectors for sale. Should I carry one when kayaking? What else can I do such that boats can use their radar to be aware of my location when they can’t see me due to poor ...
18
votes
1answer
737 views

Identification of a jellyfish-like, shapeless sea-creature from India

Photographed off the Western coast of India, Goa, to be precise. Not even sure this is a creature since I've never seen anything like it. It appeared to move by shooting tiny jets of water from its ...
10
votes
2answers
4k views

How would a sea turtle end up on its back?

There is a video going round of two guys flipping a sea turtle that had ended up on its back so it could get back into the water. How would a sea turtle end up on its back in the first place (it sure ...
12
votes
2answers
1k views

What are these round, spiny, puffy, green things from the ocean in Northeast United States?

Last October, we were on a road above a beach in a small town near Bar Harbor, Maine, in the Northeast United States. We looked down and saw two fishermen loading their trucks with piles of something ...
5
votes
2answers
322 views

What's the difference between the Norwegian fjord and the Scottish sea loch?

I want to know the major differences between these two systems.
30
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2answers
6k views

Is it possible to 'live off the sea'

I've recently become aware of the american 'survivalist' or 'prepper' phenomenon. The general idea seems to be that 'something bad' (exactly what seems to vary) is going to happen, civilization will ...
4
votes
1answer
242 views

How can I tell if there's a camouflaged octopus in a coral reef, so I can keep from disturbing it?

This question is based on my desire to avoid disturbing, injuring, or scaring away an octopus which is camouflaged to look like a coral reef. Since it's so difficult to see, I'd like to know how to ...
11
votes
1answer
5k views

What are those white spots on the sea

Yesterday I was flying above the Mediterranean sea, it was a nice day, without storms or strong winds. I fly around 20 minutes above it before arriving to the ground. During these 20 minutes I saw ...
11
votes
2answers
146 views

Indicators of good Atlantic Ocean surf conditions

When researching surf conditions, what weather cycles indicate good overall conditions for a North American Atlantic Ocean-based break?
6
votes
1answer
666 views

What is the history of the Duckbill rock formation in Oregon?

During an internet search for fun places to go in the Western United States, I came across a number of articles about an unusual rock formation in Oregon called Duckbill. It was called iconic, ...
9
votes
1answer
153 views

What is the Chincoteague Pony Swim on Assateague Island in Virginia and Maryland?

Ever since I read a book called Misty of Chincoteague as a child, I've wanted to see the Wild Chincoteague Ponies, on the Eastern shore of the United States. I believe there are two herds on ...
10
votes
2answers
151 views

How to make my kayak Eskimo roll reliable in rough water?

How do I develop my kayak “Eskimo roll” from something I can do most of the time in a calm lake or pool to something I can trust to work close to 100% of the time in real sea or river conditions?
8
votes
3answers
310 views

Kayak for fishing and low class rapids?

I am in the market for a kayak and am wondering what type of kayak or what features I should look at given my requirements. Here's the details you'll probably need to help me out: I'm 6'1" and 215 ...
4
votes
2answers
325 views

What are the differences between a lighthouse and a light station in terms of the specific purpose?

One summer evening we drove to Race Point, the farthest tip of Cape Cod, Massachusetts, USA. We were told there was a lighthouse at that spot, and wanted to see the light shine through the darkness, ...
1
vote
2answers
250 views

What type of boat is this with a single mast and a square sail? [closed]

What type of boat might this be? Or what category of boats would it fall under?
35
votes
1answer
37k views

How much sea water can I safely drink?

Anyone who has played in the ocean knows getting a little sea water in your mouth and swallowing it will not kill you. Seawater contains salt. When humans drink seawater, their cells are thus ...
2
votes
0answers
206 views

How much food is needed for three months of food when rowing across an ocean?

Related to this question, if one were to go on a three-month rowing trip across an ocean, is there an estimate of how much the food would be needed? It's certainly possible to give an estimate when ...
3
votes
1answer
152 views

How predictable are the doldrums?

There have been a few Atlantic and Pacific row boat crossings. Poor weather is a significant risk. While it might be nice to row with the wind at your aft (back of boat), it might also be nice to ...
8
votes
2answers
132 views

What is head/lift indication in a digital compass on a sailboat?

A simple explanation would be great. I am reading a manual for digital compass and there is a paragraph with the following words: The SpeedPuck automatically detects when a sailor is trimmed to a ...
0
votes
1answer
140 views

What are the shortest and longest crossing points of the Atlantic?

Inspired by a recent question. If I want to cross the Atlantic Ocean in a boat, what are the shortest and longest possible crossing sites? Where crossing = going from one continent to another where ...
4
votes
2answers
241 views

Activities on a long voyage to avoid boredom?

What should the crew and passengers do on a long voyage? If they do nothing, their attention is scattered and may become remiss. You can begin to wash the boat, but I do not think that is the best ...
15
votes
1answer
3k views

Can I get fresh water from ocean fish flesh?

Ocean water has about 35 Grams of salt per liter. For the human body salt content in body fluids is about 9 Grams per liter. See related question How much sea water can I safely drink? While it is ...
6
votes
1answer
323 views

How to recognize an ocean desert from the surface?

There are large areas of the ocean that are essentially lifeless, often called ocean deserts. If I am traveling the ocean, and not familiar with potential sea life in the area, can I tell from clues ...
5
votes
1answer
186 views

When fishing in the Ocean off the US coast, at what point do fishing laws stop?

If you are fishing in the ocean off the United States Coast. At what distance from shore do US fishing laws no longer apply? The US Coast Guard listes, boundaries at 12, 24 and 200 Miles. ...
7
votes
1answer
390 views

How can you identify whether brackish water is too salty to drink?

Sometimes there are sources of water which are slightly contaminated with salt, such as coastal wells or pools of rainwater in rocks near the coast, or water containers with pinhole leaks which have ...
5
votes
2answers
107 views

How reliably can you assess the condition of a reverse-osmosis desalinator?

Handheld desalinators operating on the principle of reverse osmosis are available for emergency use in lifeboats. Sometimes they appear for sale unused in their original packaging at a very steep ...
5
votes
1answer
109 views

Can I get fresh water from ocean plants?

In the answer to Can I get fresh water from ocean fish flesh? I learned that the water I can get from eating fish has a low enough salt content that it will hydrate me, BUT the high protein count will ...
4
votes
2answers
712 views

Portable desalination hand pump filter life?

I was looking into portable desalination hand pumps. and I found this one one Amazon for $959 it says the Katadyn Survivor 06 is the world's smallest hand-operated desalinator and can easily fit ...
4
votes
1answer
114 views

How do some of the materials in the clothing we wear endanger marine life and the undersea environment?

I was recently told that many of the clothes we wear are made up of materials that are dangerous to marine wildlife, and the undersea environment. I'm curious as to whether or not it's true. I know ...
4
votes
1answer
125 views

Does a hands-free kayak bilge pump exist that is as speedy and reliable as a hand pump?

Does anyone have any experience they can share with actual use of a hands-free kayak bilge pump? I’m curious about foot-operated/electric/other, purchased or custom built, anything that lets me keep ...
2
votes
0answers
82 views

I feel little stings in the sea [duplicate]

Yesterday I went to the beach when I get in the water everything was fine the water not cold the sea very clear. Then I started feeling little stings at all my body.I thought it was my idea. When I ...
21
votes
2answers
4k views

What's the difference between a fjord and a fjard?

Last year we visited some friends at their summer home in Lamoine, Maine, in Northeast United States. They took us to a place called Somes Sound, on Mount Desert Island. It's either in or near Acadia ...
12
votes
4answers
4k views

How to estimate current speed and direction while swimming at sea?

In an episode in the tv series "I shouldn't be alive", crew members of a yacht racing team got caught in a violent storm and found themselves stranded in the Gulf of Mexico after their boat capsized. ...
3
votes
1answer
60 views

Telescopic surf fishing rods - Are less segments better?

I am looking for a telescopic surf fishing rod of about 14 feet length & lure weight up to 250grams/8oz. Is it better if a telescopic surf rod has less segments or does it not matter ? This one ...
6
votes
1answer
99 views

Beach fishing - Should I get waders or long rod to cast further into the sea?

Many beaches where I want to do surf fishing (from shore) are almost flat for many feet into the sea. Some of the beaches have a steep slope into the sea. I hope to catch striped bass, perch or ...
8
votes
1answer
3k views

Can I guess the size of a shark by the size of its dorsal fin?

Is there a relative scale to which one can estimate the size of a shark by looking at its dorsal fin? I know it will differ from species to species, but is there a general guideline maybe for each? ...
5
votes
1answer
116 views

Are coasteering routes graded, or does one have to rely on a qualitative description of the difficulties of a route?

What, you may ask, is coasteering? Does saying it is similar to kloofing help? Thought not. Many sites describe coasteering; here is a brief description exerpted from outsideonline.com, What Is ...
14
votes
1answer
27k views

What's that stinging feeling when I swim in the sea?

When I swim in the sea around Singapore, I get stinging/prickling/electric sensations on my skin in certain areas of the water sometimes. There aren't any visible creatures nearby. What are these? ...
19
votes
2answers
1k views

How should I check that the anchor is secure when I anchor a small yacht off unfamiliar land?

When sailing I may anchor in a different bay each evening and take a dinghy in to land to sleep in a tent overnight. I always worry that when I wake up in the morning the boat may no longer be there....
15
votes
3answers
10k views

Is saltwater antiseptic?

On some occasions you don´t have anything to desinfect wounds, for example during a (short) walk along the beach. If you cut yourself or have a an small wound that needs cleaning, would it be wise to ...
9
votes
2answers
278 views

What will the water temperature be at Sharm el-Sheikh at a depth of 30m in October?

You can easily find the temperatures at the surface of the sea. However, to choose the correct diving suit, I would like to know the temperatures that can be expected at a depth of about 30 meters (...
14
votes
5answers
2k views

What's a realistic distance to expect boys aged 11-17 to sea kayak in a single day?

I'm thinking about taking my Scout troop (boys aged 11-17) on a sea kayaking trip. What expectations should I have for the distance that we can travel in one day? Assume good weather (clear skies, ...