Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Common Leveling Mistakes and Errors

Common Leveling Mistakes and Errors

A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Association of GLP-1 Receptor Agonists Versus Bariatric Surgery with Outcomes in Obese Patients with Hypertrophic Cardiomyopathy: A Multicenter Propensity-Matched Analysis.

European heart journal. Quality of care & clinical outcomes·2026

Same author

Cardiovascular outcomes following bariatric surgery in obese patients with hypertrophic cardiomyopathy: A multicenter propensity-matched analysis.

American heart journal plus : cardiology research and practice·2026

Same author

Warm versus cool colors and their relation to color perception.

Journal of vision·2025

Same author

Using Smooth Metamers to Estimate Color Appearance Metrics for Diverse Color-Normal Observers.

Color research and application·2022

Same author

Domestic dogs (Canis familiaris) grieve over the loss of a conspecific.

Scientific reports·2022

Same author

Color appearance model incorporating contrast adaptation - implications for individual differences in color vision.

Color research and application·2021

Search research articles

Related Experiment Video

Updated: Feb 26, 2026

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions

Published on: May 2, 2019

Navigational range lights: effect of stimulus configuration on alignment accuracy.

Stanley Coren¹, Lorne A Whitehead², Michael J Baca³

¹a Department of Psychology , University of British Columbia , 2136 West Mall , Vancouver , V6T IZ4 , Canada.

|July 21, 2017

Summary

This summary is machine-generated.

Using linear range lights significantly improves navigational accuracy. This study demonstrates a 69.4% error reduction, enhancing maritime safety by making channel alignment clearer.

Keywords:

Direction Nautical environment Navigation Orientation Range lights Stimulus configuration Vernier alignment Visual acuity

More Related Videos

Practical Methodology of Cognitive Tasks Within a Navigational Assessment

Practical Methodology of Cognitive Tasks Within a Navigational Assessment

Published on: June 1, 2015

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Published on: April 11, 2025

Related Experiment Videos

Last Updated: Feb 26, 2026

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions

Published on: May 2, 2019

Practical Methodology of Cognitive Tasks Within a Navigational Assessment

Practical Methodology of Cognitive Tasks Within a Navigational Assessment

Published on: June 1, 2015

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Published on: April 11, 2025

Area of Science:

Nautical navigation
Human visual perception
Optical engineering

Background:

Range lights are crucial for maritime navigation, guiding vessels through channels by indicating the safe path.
Current range light systems often use point sources, which can lead to alignment ambiguities.
Accurate alignment is essential to prevent grounding and collisions.

Purpose of the Study:

To investigate the efficacy of linear stimuli compared to point stimuli for range lights.
To quantify the improvement in alignment accuracy using linear range lights.
To assess the potential safety benefits of implementing linear range lights.

Main Methods:

Two experiments were conducted: a laboratory simulation and a field test with full-sized range lights.
Participants performed a vernier alignment task using both point and linear light stimuli.
Navigational alignments were assessed at a distance of 0.5 nautical miles.

Main Results:

Linear stimuli significantly improved the accuracy of the vernier alignment task compared to point stimuli.
An average reduction in alignment error of 69.4% was observed when using linear range lights.
Field tests confirmed the laboratory findings, demonstrating practical applicability.

Conclusions:

Linear range lights offer a substantial improvement in navigational accuracy over traditional point sources.
The enhanced accuracy translates to a significant potential increase in maritime safety.
Adoption of linear range lights could reduce navigational errors and associated risks.