Line Hauler System for Synchronized Vessel Unloading
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Solution Overview
Problem
The current method of unloading fish from fishing vessels, which involves a drag line formation and manual coordination, is time-consuming, labor-intensive, and prone to accidents due to fatigue, lack of seamanship, and harsh environmental conditions, especially in crowded Alaskan fisheries where many boats need to unload simultaneously.
Innovation Solution
A fish tender vessel equipped with a line hauler and pulley system that uses a floating line to centrally control the movement of fishing vessels alongside the vessel, allowing for synchronized and efficient unloading and loading of fish and supplies, reducing the need for manual coordination and minimizing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fishing vessels use manual coordination and self-power movement to form a drag line, then they can maintain flexibility and adaptability, but the process becomes time-consuming and labor-intensive
Solution Approach 1:
The patent introduces a line hauler system with a winch and controlled line as an intermediary mechanism between the fishing vessels and the unloading station. This centralized control system eliminates the need for manual coordination among vessels, allowing the line hauler to automatically position vessels alongside the unloading station, thereby reducing time loss while maintaining operational flexibility
Solution Approach 2:
The patent replaces the traditional mechanical system of vessels using their own engines to maneuver and coordinate in a drag line with an automated line hauler system. The winch and controlled line mechanism substitutes for the collective mechanical effort of multiple vessels, enabling precise positioning and synchronized unloading operations without requiring each vessel to independently power its movement
2Adaptability or versatility
If fishing vessels manually coordinate their positions and movements, then they can adapt to changing conditions, but coordination effort and complexity increase significantly
Solution Approach 1:
The line hauler system acts as an intermediary that centralizes coordination control. Instead of each vessel independently monitoring and adjusting its position based on environmental conditions, the system uses a single controlled line to manage all vessel positions, significantly reducing coordination complexity while maintaining adaptability through the winch operator's control
Solution Approach 2:
The controlled line serves multiple functions simultaneously: it positions vessels alongside the unloading station, controls their movement speed, coordinates their docking sequence, and allows for easy repositioning. This multi-functional system eliminates the need for multiple separate coordination mechanisms, reducing overall system complexity
3Ease of operation
If fishing vessels repeatedly motor forward and tie off under their own power, then they can position themselves at the unloading station, but this increases the risk of collisions and accidents
Solution Approach 1:
The controlled line acts as an intermediary safety mechanism that eliminates direct vessel-to-vessel and vessel-to-station collisions. The line hauler system carefully manages the line tension and vessel positioning, ensuring vessels arrive at the unloading station safely without requiring aggressive maneuvering or repeated docking attempts that could cause collisions
Solution Approach 2:
The system performs preliminary positioning actions by using the controlled line to guide vessels to the correct position before unloading begins. The winch operator can pre-position vessels at optimal locations, ensuring they are safely and correctly positioned before the unloading process starts, thereby preventing collisions during the actual unloading operation
4Productivity
If captains and crew work continuously for twenty days straight, then they can complete the fishing season, but fatigue and sleep deprivation increase accident risk
Solution Approach 1:
The line hauler system enables self-service positioning where the automated system handles the complex tasks of vessel positioning, docking, and undocking. This eliminates the need for captains and crew to manually coordinate and maneuver vessels, reducing the physical and mental strain during already exhausting 20-day work periods, thereby improving safety without compromising productivity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution significantly reduces the time and effort required for unloading and loading operations, enhances safety by minimizing collisions, and allows vessels to return to fishing quickly, even in challenging conditions.
Implementation Method 1
A line hauler on a fish tender vessel pulls a line
Implementation Method 2
The line extends from the line hauler toward the bow of the vessel to a pulley mounted on a respective port or starboard side
Implementation Method 3
The line extends down to the sea, then extends on the surface of the sea adjacent the respective port or starboard side
Data Source
AI summary
A line hauler on a fish tender vessel is mounted to a port or starboard quarter location of a deck of the vessel. A loop of floating line is wrapped around the line hauler, extends toward the bow of the vessel to a pulley mounted on a respective port or starboard side, then extends down to the sea, then extends on the surface of the sea adjacent the respective port or starboard side to at least the location where the line hauler is mounted to the deck, and then extends from the surface of the sea back to the line hauler. The loop of line moves in a circle when the line hauler pulls on the line. Lead lines are connected to the line. Fishing vessels attached to the lead lines are pulled alongside the respective port or starboard side of the vessel when the line hauler pulls the line.