What's the difference between a giant tide and a spring tide? What do spring tides and small tides mean?

What's the difference between a giant tide and a spring tide? What do spring tides and small tides mean? Tide is the daily change of sea surface tidal adjustment. During the new moon (the first day of the summer calendar) and the lunar calendar (the fifteenth day of the summer calendar), because the sun, the moon and the earth are in a similar straight line, the tidal accumulation caused by the sun and the moon makes the sea level rise and fall more violently.

Tides occur on the seventh and 22nd day of the seventh lunar month, and the earth, the moon and the sun have oblique angles. Because the harm of the sun and the moon to the earth's tides is partially offset, the relative height of the tides formed is also low. On the first or fifteenth day of each month, the sun, the earth and the moon are basically in a straight line, and the sum of the gravitational forces of the sun and the moon works together on the sea water.

At this time, the increase of seawater is relatively large, which is the wave we see; On the eighth or 23rd day of each month, the sun, the earth and the moon basically form an oblique angle, so the gravity of the moon is partially offset by the gravity of the sun, and then the increase of seawater is relatively small, that is, we see a small tide.

Generally speaking, it is best to choose the time to go out to sea during the flood season, because the seawater recedes far and quickly during the flood season, especially the shellfish and seafood behave slowly. When the sea recedes, this shellfish seafood will be left idle on the beach or mudflat, and this flood season is best around the 26th day of the lunar calendar every month.

Because the habitat of each seafood product is different, as far as catching the sea is concerned, areas with more pearls and sand are generally chosen. If you ask the local seaside people before going out to sea, they all know where to find that kind of seafood. There is a stone near the mountain on the beach. This stone will produce oysters. This oyster shell is very sharp, and there are stone dams in areas without mountains. Li Du also grew up on this stone dam. If it touches the skin slightly, it will be cut by the oyster shell. Therefore, the military had better wear rubber boots. You must wear gloves if you want to catch crabs.

Sunscreen, a small shovel, a small bucket and rain boots are essential for going to sea. In addition, you can also carry gloves, small nails, and sun umbrellas. You can also catch the sea at night ~ if you choose to go at night, bring a flashlight.