Technical specifications of equipment for monitoring waves and surface sea water temperature in Vietnam

No

Content

Symbol

Unit of measure

Measuring range

Resolution

Measurement error

1

Wave height

H

Meter (m)

0 to 20

0.005 m

± 10 %

2

Wave propagation direction

Angle degree ( ^o ), compass direction

0 to 360

Automatic 1^o, manual 22,5^o

± 10 ^o

3

Wave length

λ

Meter (m)

0 to 200

0.1

± 1 (m)

4

Wave cycle

Second(s)

0 to 20

0.1

± 0.1 (s)

5

Wave transmission speed

C

Meter/second (m/s)

0 to 20

± 1 %

No

Wave type

Symbol

1

Waves

G

2

Rogue waves

L

3

Waves/rogue waves

G/L

4

Rogue waves from two different directions

L/L

5

Rogue waves/waves

L/G

6

Waveless

-

No

Wave

Symbol

1

Rolling waves

LT

2

Regular waves

D

3

Waves are uneven

KD

No

Altitude (m)

How to record

1

0.00

0.00

2

0

0.20

3

From 0.25 to 1.50

0.25; 0.50; 0.75; 1.00; 1.25; 1.50

4

From 2.00 to 4.00

2.00; 2.50; 3.00; 3.50; 4.00

5

From 4.50 and up

Rounding to the nearest meter: 5.00; 6.00; 7.00; ...

No

Wave propagation direction

Symbol

Wave propagation direction

Symbol

1

Northeast

NE

Southwest

SW

2

East

E

West

W

3

South East

SE

northwest

NW

4

South 

S

North

N

No

Signs identifying sea surface status

Grant

1

The water surface is as smooth as a mirror

0

2

The water surface shook, rippling very thick waves

1

3

When the wave falls, there is only foam as clear as glass

2

4

Silver waves appear in some places on the sea surface

3

5

When the front of the wave falls, there is white foam. The white foam spreads down the entire side of the wave and appears everywhere on the sea surface

4

6

When the front of the wave falls, there is white foam, the foam spreads down the side of the wave, the base of the wave creates large pieces of foam that shoot up onto the sea surface and are found everywhere.

5

7

When white foam covers both sides of the wave, creating a large white patch that shoots up on the sea surface, long wave blades are seen everywhere.

6

8

When there is a storm, white waves cover almost the entire sea surface, and water foam shoots high

7

9

The entire sea surface is covered with white foam, the wind blows away the tops of the waves, and in the air there is water spray and water droplets flying with the wind, corresponding to when there is a big storm.

8

10

The entire sea surface was covered with white foam, the air was full of spray and water droplets, visibility was greatly reduced, and the storm was very big.

9