Honors Theses and Capstones

Date of Award

Spring 2015

Project Type

Senior Honors Thesis

College or School



Mechanical Engineering

Program or Major

Mechanical Engineering

Degree Name

Bachelor of Science

First Advisor

Shachak Pe'eri

Second Advisor

May-Win Thein


Harbors and ports provide the infrastructure for commercial trade and naval facilities. It is vital to ensure the safety of these locations. The Harbor Security System provides an optical ‘gate’ using underwater lasers and photodetectors. This system allows monitoring of both surface and submarine vessels traveling into and out of the harbor. Also, the system provides real time alerts when unauthorized vessels enter the harbor. This project provides a proof of concept for a Harbor Security System to be implemented in Portsmouth Harbor. A scaled model of the detection system was constructed and tested. This detection system is capable of detecting surface and submarine vessels along with their velocity and length. Results of the study showed that the average error of the size estimate was 15% and the average error of the velocity estimation ratio(slope) was 9%.