Watercraft Positioning Control for No-Anchor Zone Drift Management

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Solution Overview

Problem

Watercrafts face increased energy consumption and environmental impact when anchoring is prohibited, necessitating continuous propulsion to maintain position, which is costly and environmentally disadvantageous.

Innovation Solution

A control device that detects the watercraft's position and determines a new position within a defined region, allowing movement without anchoring, minimizing drive activation to stay within the region, using positioning parameters to optimize repositioning and avoid exclusion zones.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If continuous propulsion is used to maintain watercraft position in no-anchor zones, then the watercraft can stay in prohibited anchoring areas, but energy consumption and emissions increase significantly

Engineering Contradiction:
Improveposition holding capabilityVSAvoidenergy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system uses periodic monitoring of position parameters and intermittent drive activation rather than continuous propulsion. The control device periodically checks if the watercraft approaches boundary lines and only activates the drive when necessary to perform repositioning maneuvers, converting continuous energy consumption into periodic, demand-based activation.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The watercraft utilizes natural environmental forces such as wind and currents to maintain its position within the delimited region. By allowing the watercraft to drift passively and only intervening when boundary violations are imminent, the system lets the environment perform the work of position maintenance, eliminating the need for continuous active propulsion.

Inventive Principle:
Principle #25Self-service

2Reliability

If the watercraft is permanently retained in a certain position by propulsion, then anchoring prohibitions are complied with, but operational costs increase

Engineering Contradiction:
Improvecompliance with anchoring prohibitionsVSAvoidoperational cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The control device continuously monitors the watercraft's position relative to boundary lines and uses this feedback to determine when drive activation is necessary. This closed-loop control ensures compliance with anchoring prohibitions by detecting approaching boundary violations and triggering corrective maneuvers only when needed, rather than maintaining constant propulsion.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

Instead of applying full propulsion continuously, the system applies partial drive activation only to the extent necessary to prevent boundary violations. The control device calculates minimal repositioning maneuvers that are sufficient to maintain compliance, avoiding excessive energy expenditure while still ensuring the watercraft remains within prohibited anchoring zones.

Inventive Principle:
Principle #16Partial or excessive action

3Reliability

If the drive is activated frequently to maintain position, then the watercraft remains within the delimited region, but emissions and environmental impact increase

Engineering Contradiction:
Improveposition control accuracyVSAvoidemissions
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The system replaces frequent, continuous drive activation with periodic, event-driven propulsion. The control device monitors position parameters and only activates the drive when boundary approach is detected, converting frequent emissions-generating operations into rare, necessary interventions that maintain position control while minimizing environmental impact.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system converts the potential harm of boundary violations into a beneficial trigger for minimal necessary drive activation. By using the threat of leaving the delimited region as the trigger for propulsion, the system ensures compliance is maintained through the smallest possible interventions, turning a harmful scenario into an opportunity for efficient, emission-reduced operation.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS12589843B2Control device for controlling a watercraft, watercraft having such a control device, and method for controlling a watercraft
Publication Date: 2026.03.31 ROLLS ROYCE SOLUTIONS GMBH
  • US12589843B2 patent drawing
  • US12589843B2 patent drawing
  • US12589843B2 patent drawing

AI summary

A control device for controlling a watercraft includes a position detection module and a positioning module. The position detection module is configured to detect a current position of the watercraft. The positioning module is configured to determine a new position for the watercraft within a delimited region depending on at least one positioning parameter when the watercraft approaches a boundary of the delimited region to within a predetermined distance or a parameterizable distance.