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Questions tagged [sea]

Questions specific to the sea or oceans

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41 votes
1 answer
51k 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 taking ...
James Jenkins's user avatar
34 votes
2 answers
13k 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 ...
ConanTheGerbil's user avatar
27 votes
3 answers
45k views

How is hygiene possible with ocean water only?

Is it possible to clean yourself and clothes with ocean water only, without polluting the water and almost without budget ? If so, how ? I've read that it's possible to: brush your teeth with sand, ...
jpic's user avatar
  • 371
24 votes
7 answers
946 views

How to minimize sea sickness?

I love sailing, and my wife loves the ocean, but she gets sea-sick often. Any advice on how to avoid sea-sickness in people prone to it? I'm looking for advice in terms of foods that are less of an ...
Didi Kohen's user avatar
23 votes
4 answers
7k views

How efficient is travel by canoe?

How efficient is travel in a canoe, in terms of effort/time required to cover distance? Or kayak, pirogue, any kind of small boat that is moved by paddling instead of sail or motor - is there a ...
rwallace's user avatar
  • 1,701
21 votes
8 answers
8k views

What are the dangers of swimming in natural waters?

What are the dangers of swimming in natural bodies of water? In essence I would like to know about all types of waters, but I am mostly interested in sea because it is most relevant to me. Like many ...
Dominykas Mostauskis's user avatar
21 votes
2 answers
6k 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 ...
Sue Saddest Farewell TGO GL's user avatar
19 votes
3 answers
2k 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....
Rory Alsop's user avatar
  • 24.9k
19 votes
2 answers
2k views

Swimming while in the high seas

When sailing, can the passengers of the yacht safely go swimming while in the open seas? That is, when some miles away from the coast-line.
Pierre B's user avatar
  • 493
19 votes
2 answers
4k views

How to estimate distances while at sea?

While kayaking or swimming out in the open waters, it is quite important to be able to judge distances accurately before attempting to get from one point to another, such as from island to island. ...
Question Overflow's user avatar
18 votes
1 answer
779 views

When stranded at sea, should I not ask for a tow?

I've been told that you should never ask for a tow when you are stranded at sea. The reason given is that the person towing can claim a huge share of the stranded boat, potentially all of it if it's ...
Stefano Borini's user avatar
18 votes
1 answer
830 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 ...
Neodymia's user avatar
  • 189
16 votes
3 answers
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 ...
mmcc's user avatar
  • 3,466
16 votes
3 answers
11k 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 ...
Paul Paulsen's user avatar
  • 4,329
16 votes
2 answers
574 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 ...
Toby Speight's user avatar
  • 4,771
16 votes
4 answers
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. ...
Question Overflow's user avatar
16 votes
4 answers
7k 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 ...
Mr. Boy's user avatar
  • 631
15 votes
1 answer
4k 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 ...
James Jenkins's user avatar
14 votes
5 answers
3k 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, ...
Mark's user avatar
  • 657
14 votes
2 answers
7k views

How do I desalinate seawater?

I know I shouldn't drink seawater (because of the salt it contains), but how can I desalinate it?
Jasper's user avatar
  • 2,019
14 votes
4 answers
2k 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 ...
Mr. Boy's user avatar
  • 631
14 votes
2 answers
5k views

How to maximise the chances of survival when stranded in open sea?

I read with interest about news of a scuba diver being stranded in the open sea when the diving operator failed to account for all members of a group. Mishaps like this and accidents such as boat ...
Question Overflow's user avatar
14 votes
1 answer
36k 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? ...
Andrew Tan's user avatar
12 votes
1 answer
13k 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 ...
user14255's user avatar
  • 129
12 votes
3 answers
369 views

What Navigation Aids can I make on an island with only a knife?

In a recent discussion about navigating from a deserted island, it was suggested that if I have a knife and natural resources I could create my own navigation aids. In this instance I was planning to ...
James Jenkins's user avatar
12 votes
2 answers
2k 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 ...
Sue Saddest Farewell TGO GL's user avatar
11 votes
2 answers
768 views

What makes a good surfing location?

Obviously it is hard to surfboard without any decent surf. I know in England the best surf is near the South West, Cornwall and Devon being famous for it (Woolacombe and Newquay), but elsewhere I'd ...
Aravona's user avatar
  • 15.4k
11 votes
2 answers
528 views

Is sunscreen toxic to marine life, especially coral reefs?

As part of an effort to be a responsible user of the world's waterways, I've been thinking about ways to reduce marine pollution. A friend told me that certain chemicals in common brands of sunscreen ...
Sue Saddest Farewell TGO GL's user avatar
11 votes
1 answer
4k views

What sort of white rock with lots of small holes is this?

This interesting pebble caught my eye the other day when I was wandering around on an Anglesey beach in Wales, UK but I haven't a clue what sort of rock it is and what has caused the little holes in ...
user avatar
11 votes
2 answers
168 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?
dangeranger's user avatar
  • 4,514
10 votes
2 answers
7k 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 ...
Charlie Brumbaugh's user avatar
10 votes
2 answers
242 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?
mmcc's user avatar
  • 3,466
10 votes
1 answer
131 views

Are the birds that snatch bread out of the air "more citified" (tamer) than those who let it drop?

I often take a slice of bread to the beach when I go on my beachcombing ramblings, and throw pieces of it to the shore birds that are, like me, combing the beach but, unlike my search for "jewels" are ...
B. Clay Shannon-B. Crow Raven's user avatar
9 votes
3 answers
825 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 (...
Scz's user avatar
  • 291
9 votes
1 answer
79 views

Looking for snorkeling sites with healthy coral

I've snorkeled only in Hawaii, the Seychelles, Palau and Yap and never seen anything but healthy sites with no bleached coral -- maybe because I was with guides who knew the area. Thus, I am spoiled. ...
ab2's user avatar
  • 23.9k
9 votes
1 answer
370 views

Is it legal to sail a personal-size boat in the ocean in Massachusetts during a thunderstorm?

When I was younger, during the late 1960's and 1970's, my Dad had a personal-size sailboat, called the Sunfish. He loved it because it was lightweight, easy to sail on his own, and had room to ...
Sue Saddest Farewell TGO GL's user avatar
9 votes
1 answer
231 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 ...
Sue Saddest Farewell TGO GL's user avatar
8 votes
5 answers
1k 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....
Ray Butterworth's user avatar
8 votes
3 answers
4k views

Is this sand dollar with barnacles attached to it at all rare?

While taking my usual stroll along Del Monte beach in Monterey yesterday, I found this sand dollar with a clump of barnacles attached: Is this rare at all? Any observations on why it would wash up ...
B. Clay Shannon-B. Crow Raven's user avatar
8 votes
2 answers
273 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 ...
Vladimir Markiev's user avatar
8 votes
2 answers
732 views

What sea life may be hazardous when rockpooling?

Back on my childhood nostalgia train... After thinking about Crabbing I began to wonder if there are any particular sea life that I might have to be wary of when going rock pooling along the coastline?...
Aravona's user avatar
  • 15.4k
8 votes
3 answers
2k 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 ...
Dave's user avatar
  • 81
8 votes
1 answer
320 views

Where have all the sandpipers gone?

(long time passing). I walk along Del Monte beach in Crow City, USA (Monterey, California) quite often. For quite awhile, sandpipers were there in abundance - more than any other bird. I haven't ...
B. Clay Shannon-B. Crow Raven's user avatar
8 votes
1 answer
115 views

How do Plover sentinels give the "move out" signal?

During my usual weekend morning jaunt along Del Monte Beach in Monterey (California), I noticed for the first time the Plovers, who normally seem to forage nonstop, actually taking a communal break. ...
B. Clay Shannon-B. Crow Raven's user avatar
8 votes
1 answer
5k 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? ...
morne's user avatar
  • 183
8 votes
1 answer
140 views

Dangers of currents for windsurfers

Can sea currents be dangerous for surfers? How common would this be? Should I ask locals about currents before surfing at a new spot?
Paul Paulsen's user avatar
  • 4,329
7 votes
2 answers
446 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 ...
mmcc's user avatar
  • 3,466
7 votes
3 answers
756 views

Why do Sandpipers and Plovers "hang out" together?

I walk on Del Monte beach in Monterey, California quite often. I see LOTS of Sandpipers there; and always with them are Plovers (which remind me of little frenetic Killdeer). The Sandpipers dig into ...
B. Clay Shannon-B. Crow Raven's user avatar
7 votes
1 answer
214 views

Did I save, or prolong the death throes, of the tuna crabs?

Walking along the strand this morning in Monterey, I was confronted by hundreds (at least) of stranded (no pun intended) tuna crabs (I thought they were shrimp, but a visitor from San Diego told me ...
B. Clay Shannon-B. Crow Raven's user avatar
7 votes
1 answer
206 views

Do jellyfish actively avoid swimmers in Mediterranean?

I swam in Mediterranean in Italy quite often. There often were white (not spectacular looking) jellyfish around - and quite a lot of them. I tried not to touch them because I was afraid to get burned (...
OddDeer's user avatar
  • 23.5k