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

Buoyancy and Stability for Submerged and Floating Bodies

Buoyancy and Stability for Submerged and Floating Bodies

In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...

Buoyancy

Buoyancy

When an object is placed in a fluid, it either floats or sinks. All objects in a fluid experience a buoyant force. For example, a metal ball sinks, while a rubber ball floats. Similarly, a submarine can sink and float by adjusting its buoyancy. The concept of buoyancy raises several interesting questions. For instance, where does this buoyant force come from? How much buoyant force is required to make an object sink or float? Do objects that sink get any support at all from the...

You might also read

Related Articles

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

Sort by

Same author

Sex differences in U.S. Navy sailor well-being, sleep-related behaviors, and psychomotor vigilance performance.

Sleep advances : a journal of the Sleep Research Society·2025

Same author

Closed-Loop Auditory Stimulation (CLAS) During Sleep Augments Language and Discovery Learning.

Brain sciences·2024

Same author

Recipe for fatigue: sleep, work patterns, and well-being of galley workers on surface ships of the US Navy.

Sleep advances : a journal of the Sleep Research Society·2024

Same author

Sleepy and grumpy go hand in hand for US Navy Sailors.

Sleep advances : a journal of the Sleep Research Society·2024

Same author

Supervision of a self-driving vehicle unmasks latent sleepiness relative to manually controlled driving.

Scientific reports·2021

Same author

Dose-dependent sensorimotor impairment in human ocular tracking after acute low-dose alcohol administration.

The Journal of physiology·2020

Search research articles

Related Experiment Video

Updated: Oct 3, 2025

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind

Published on: March 27, 2013

Small Boat Recovery Task Performance in a Moving Environment.

Rebecca A Fosha¹, Panagiotis Matsangas, Patrick F Cravalho²

¹Human Systems Integration Division, USCG Headquarters, Washington, DC, USA.

|February 15, 2022

Summary

Operator performance in small boat recovery declined in severe simulated sea states. Recommendations include adding handholds and redesigning tasks for single-handed completion to improve maritime safety.

Keywords:

maritime systems physical ergonomics simulation system design task analysis

More Related Videos

Swimming Performance Assessment in Fishes

Swimming Performance Assessment in Fishes

Published on: May 20, 2011

Shallow Water Paddling Variants of Water Maze Tests in Mice

Shallow Water Paddling Variants of Water Maze Tests in Mice

Published on: June 3, 2013

Related Experiment Videos

Last Updated: Oct 3, 2025

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind

Published on: March 27, 2013

Swimming Performance Assessment in Fishes

Swimming Performance Assessment in Fishes

Published on: May 20, 2011

Shallow Water Paddling Variants of Water Maze Tests in Mice

Shallow Water Paddling Variants of Water Maze Tests in Mice

Published on: June 3, 2013

Area of Science:

Human factors and ergonomics
Maritime safety and human performance

Background:

Limited research exists on small boat recovery performance in high-amplitude, low-frequency motion simulators.
Empirical data is needed to guide the design of maritime systems for challenging sea conditions.

Purpose of the Study:

To assess operator performance during a simulated small boat recovery task under varying motion conditions.
To identify human behaviors and performance decrements associated with increasing motion severity.

Main Methods:

Thirteen experienced US Coast Guard boat crewmembers performed a small boat recovery task on the NASA Vertical Motion Simulator (VMS).
Task completion time and participant behaviors were recorded across three simulated sea states.
Performance was evaluated based on task completion and observed coping mechanisms.

Main Results:

Task performance significantly declined as simulated sea states became more severe.
Participants increasingly used one hand for balance, deviating from standard procedures.
The use of one hand for stabilization was more prevalent with greater motion intensity.

Conclusions:

Declining performance necessitates design improvements for maritime recovery systems.
Recommendations include integrating accessible handholds and modifying task design to facilitate single-handed operation.
These findings enhance understanding of gross motor task performance in complex maritime environments.