Preface
Riverboats violating the law by entering the sea, and once they are found to have entered the sea illegally, they will face a fine of up to one million or even jail time.
In waterway transportation, river boats and sea vessels are two common types of vessels. Have you ever wondered why river boats can't enter the sea, but sea boats can?
In order to understand the specific reasons for the difference between river and sea vessels, it is necessary to understand the different structures of river and sea vessels. Compare river boats with sea boats, and you'll see some important differences.
River boat construction
Riverboats are often designed and built to travel in inland rivers and lakes.
Their characteristics include: the hull is relatively small, generally the freeboard height does not exceed 5 meters, the bottom of the boat is flat, the draft is shallow, easy to dock, and the ability to move flexibly through narrow, shallow water channels.
Riverboats enter the sea
Riverboats cannot enter the sea, mainly because the marine environment is very different from the river.
If a riverboat rashly enters the sea, in the face of winds and waves that are often more than ten meters high, complex and changeable ocean currents and highly corrosive seawater, the cargo hold of a small riverboat can easily enter the water, which will lead to accidents such as tilting and buckle turning of the hull, and even the ship may be destroyed and killed.
On the other hand, most of the river vessels are self-employed, and the crew lacks experience in piloting and dealing with risks at sea. In addition, the safety protection measures of river vessels are not complete, and the configuration of communication and navigation equipment is low, which greatly increases the risk of river vessels entering the sea.
For example, Tianjin's "Xiangxiang Yin Cargo 0410" ship self-sinking accident. The "Xiangxiang Yin Cargo 0410" ship overloaded and oversailed in the navigation area under the condition that the ship was unseaworthy (the river ship entered the sea) and the personnel on board were unfit and the sea conditions were bad. In the end, the ship capsized and sank, killing 7 people and losing tens of millions.
Tianjin "Xiangxiang Yin 0410" wheel flip buckle picture
Ocean navigation has higher requirements for the structure, strength and stability of ships, and general inland river vessels cannot adapt to ocean navigation.
Construction of sea vessels
Sea vessels are specially designed and built for ocean navigation.
They have the following characteristics: the hull is larger, the structure is sturdy, and the bottom of the ship is generally designed in a V-shaped or U-shaped bottom, which can increase the contact area with the water and make the draft deeper. The bottom of the V-shaped can also cleave the waves like a blade, allowing the hull to withstand greater winds and currents. However, it is not flexible in narrow waterways and cannot navigate in shallower waterways.
In order to cope with the corrosive nature of seawater, the hulls of seagoing vessels are made of corrosion-resistant and salt-alkaline resistant steel. The hull is also painted with anti-rust, anti-corrosion, anti-alkali, fireproof and anti-acid paint up to half a centimeter thick. All of this effectively protects the hull from seawater erosion.
In addition, due to the complex and changing environment at sea, seagoing vessels are generally equipped with advanced navigation and communication equipment to ensure that they can sail safely in the vast oceans.
Sea Boat Cove
The inland river environment is not as complex as the marine environment, so sea vessels can enter the river, but they are not allowed to enter and leave the rivers and lakes unconditionally.
Due to the large hull, high weight and draft of sea vessels, sea vessels have to consider many factors such as the water depth of the inland river and the width of both banks.
For example, if a sea vessel with a draft of 10 meters enters an inland waterway only 6 meters deep, it will not be able to move forward in any way. However, even if the depth of the river is sufficient to accommodate the waterline of the seagoing vessels, the width of the riverbank may not meet the requirements of the seagoing vessels, and the sediment accumulation on both sides of the inland river can easily cause the seagoing vessels to run aground.
In addition, if a seagoing vessel wants to sail into inland waterways, the captain needs to hold a certificate of competency and the captain must sail the same type of seagoing vessel of more than 1,000 tons within two months before entering the river. Seagoing vessels that do not meet the conditions are not allowed to enter inland waterways, and seagoing vessels that violate the rules will also face penalties such as fines and temporary withholding of certificates.
epilogue
Riverboats cannot enter the sea while seagoing ships can, which is determined by their design characteristics and applicable environment. Understanding these differences is essential to choosing the right vessel for transportation and navigation.
In actual navigation, the ship operator and relevant departments need to select the appropriate ship according to the specific situation, and strictly abide by the relevant laws, regulations and safety standards to ensure the safe operation of the ship.
Resources
Why river boats are not allowed to enter the sea ?—— the voice of the boat people
The alarm bell rings for a long time, and the illegal participation of inland river vessels in maritime transportation is prevented from being carried out by Ningde Municipal Transportation Bureau
Why do sailors say that riverboats can't enter the sea? The same are boats, is there any taboo for riverboats to enter the sea?
The same are all boats, sea ships can sail into the river, why river ships can't enter the sea ?—— scientific cowardice
Popularization of ship knowledge - why river ships are not allowed to enter the sea?—— shipping online network