What does D mean in UNCLASSIFIED
D stands for Double Horizontal Anchor Windlass. It is a type of anchor windlass that is used to raise and lower anchors on ships. The main feature of a double horizontal anchor windlass is that it has two parallel horizontal shafts, each with a gypsy head attached.
D meaning in Unclassified in Miscellaneous
D mostly used in an acronym Unclassified in Category Miscellaneous that means Double Horizontal Anchor Windlass
Shorthand: D,
Full Form: Double Horizontal Anchor Windlass
For more information of "Double Horizontal Anchor Windlass", see the section below.
Construction and Working Principle
A double horizontal anchor windlass typically consists of the following components:
- Two horizontal shafts, each with a gypsy head attached
- A gearbox to transmit power from the motor to the shafts
- A clutch to engage or disengage the shafts
- A brake to stop the shafts
- A control panel to operate the windlass
The windlass is powered by an electric motor or hydraulic motor. The power is transmitted from the motor to the shafts through the gearbox. The clutch is used to engage or disengage the shafts. The brake is used to stop the shafts. The control panel is used to operate the windlass.
To raise the anchor, the clutch is engaged and the brake is released. The motor drives the shafts, which in turn rotates the gypsy heads. The anchor chain is wrapped around the gypsy heads and the anchor is raised.
To lower the anchor, the clutch is disengaged and the brake is applied. The anchor chain is released from the gypsy heads and the anchor is lowered.
Advantages of Double Horizontal Anchor Windlass
- High lifting capacity: Double horizontal anchor windlasses have a high lifting capacity, making them suitable for handling large anchors.
- Reliability: These windlasses are reliable and can withstand harsh conditions.
- Efficiency: They are efficient and can raise and lower anchors quickly.
- Compact size: Double horizontal anchor windlasses are compact and can be fitted in tight spaces.
Applications
Double horizontal anchor windlasses are used on a wide range of ships, including:
- Cargo ships
- Tankers
- Bulk carriers
- Container ships
- Offshore support vessels
- Naval ships
Essential Questions and Answers on Double Horizontal Anchor Windlass in "MISCELLANEOUS»UNFILED"
What is a Double Horizontal Anchor Windlass (D)?
A Double Horizontal Anchor Windlass (D) is a marine deck machinery used to raise and lower the ship's anchors. It consists of two horizontal windlasses mounted on the deck, each with a drum for winding the anchor chain. The windlasses are powered by electric or hydraulic motors and are controlled from a central control station.
What are the advantages of using a D-type windlass?
D-type windlasses offer several advantages, including:
- Increased efficiency: Two windlasses working in tandem allow for faster and more efficient anchor handling.
- Redundancy: In case one windlass fails, the other can still operate the anchors.
- Improved safety: The horizontal design ensures that the windlasses are below deck level, reducing the risk of injury to crew members during anchor handling operations.
What are the different types of D-type windlasses available?
D-type windlasses come in two main types:
- Electric D-type windlass: Powered by electric motors, these windlasses are quieter and more environmentally friendly than hydraulic models.
- Hydraulic D-type windlass: Powered by hydraulic motors, these windlasses offer greater power and are suitable for handling heavier anchors.
What are the key considerations when selecting a D-type windlass?
When selecting a D-type windlass, the following factors should be considered:
- Anchor size and weight: The windlass should be capable of handling the size and weight of the anchors used on the vessel.
- Deck space availability: The size and layout of the deck will determine the type of windlass that can be installed.
- Power requirements: The power supply on the vessel must be sufficient to operate the windlass.
- Maintenance requirements: The windlass should be easy to maintain and repair.
How is a D-type windlass installed and operated?
Installing and operating a D-type windlass involves the following steps:
- Installation: The windlasses are mounted on the deck, and the anchor chains are connected to the drums.
- Operation: The windlass is controlled from a central control station. To raise the anchor, the drums are rotated in the "heave" direction, winding the anchor chain onto the drums. To lower the anchor, the drums are rotated in the "veer" direction, allowing the anchor chain to unwind.
Final Words: D or Double Horizontal Anchor Windlass is a type of anchor windlass that is used to raise and lower anchors on ships. It is a reliable, efficient, and compact windlass that is suitable for handling large anchors.