Ship Collision Risk Display for Front-or-Rear Passing Cues
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Solution Overview
Problem
Existing ship collision risk evaluation techniques, such as OZT, fail to clearly indicate whether a ship passes through the front or rear of another ship, making it difficult to grasp the relative position.
Innovation Solution
A ship monitoring device that identifies and displays distinct collision risk areas on an estimated course, with differentiated end parts indicating whether a ship passes through the front or rear of another ship, using data from GNSS, radar, and AIS to calculate and visualize risk areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If collision risk areas are displayed on the estimated course of another ship, then the risk areas become visible, but it remains difficult to grasp whether a ship passes through the front or rear of another ship
Solution Approach 1:
The patent applies local quality by differentiating the display characteristics of specific regions within the collision risk areas. The end parts of the first and second collision risk areas are displayed with distinct visual characteristics (such as different colors, patterns, or symbols) compared to the remaining portions. This localized differentiation enables mariners to quickly identify whether a ship passes through the front or rear of another ship by observing which end part is highlighted, thereby resolving the information deficiency without requiring a complete redesign of the entire display system.
2Ease of operation
If the end parts of collision risk areas are displayed differently, then it becomes easier to grasp relative position, but the display becomes more complex
Solution Approach 1:
The patent employs color changes as a primary visual differentiation method. The end parts of the collision risk areas are displayed in distinct colors or with different color intensities compared to the remaining portions. For example, one end part may be displayed in a warmer color while the other in a cooler color, or one may be highlighted with a brighter intensity. This color-based differentiation provides immediate visual cues about relative ship positions, significantly improving ease of operation while adding minimal complexity to the display system.
Data Source
AI summary
A ship monitoring device includes processing circuitry that acquires first and second ship data indicative of a position and a velocity of a first ship and a second ship. It identifies, a first area of an estimated course of the second ship, where a risk of the first ship and the second ship colliding with each other becomes more than a given value, and a second area separated from the first area in a traveling direction of the second ship. It displays a first collision risk area including the first area, and a second collision risk area including the second area, and displays an end part of the first collision risk area on the second area side and an end part of the second collision risk area on the first area side so as to be discriminated from the remaining end parts.