Subbottom profiling in shallow water: The Akko 4 test case

Ole Gron, Debbie Cvikel, Lars Ole Boldreel, Jean Pierre Hermand

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The paper discusses the detection of shipwrecks embedded in sea-floor sediments using a Chirp sub-bottom profiler. From a methodological-historical perspective it examines four examples of recent chirp recordings of verified shipwrecks embedded in different types of sediment environments, in different geographical and geological areas and from different periods. The effects of shallow water depths, various sediment types, recording speed and different (2D and 3D) sub-bottom profiler systems are briefly discussed. It is concluded that Chirps are well suited for survey purposes, producing high quality 2D profiles of good resolution and satisfactory penetration depth. Furthermore, the equipment is easy to handle from a small boat and allows flexible sailing. This type of 2D data is cheaper and faster to acquire, easier to interpret and apparently also provides better resolution and detail than that from present 3D systems. Chirp data are therefore of great value in identifying and outlining shipwrecks hidden in the sea floor in survey situations where larger areas must be covered. The overall conclusion is that there are grounds for optimism with regard to the application of this method for detection of maritime archaeological targets.

Original languageEnglish
Title of host publication2015 IEEE/OES Acoustics in Underwater Geosciences Symposium, RIO Acoustics 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467370196
DOIs
StatePublished - 18 May 2016
EventIEEE/OES Acoustics in Underwater Geosciences Symposium, RIO Acoustics 2015 - Rio de Janeiro, Brazil
Duration: 29 Jul 201531 Jul 2015

Publication series

Name2015 IEEE/OES Acoustics in Underwater Geosciences Symposium, RIO Acoustics 2015

Conference

ConferenceIEEE/OES Acoustics in Underwater Geosciences Symposium, RIO Acoustics 2015
Country/TerritoryBrazil
CityRio de Janeiro
Period29/07/1531/07/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

  • Akko 4 shipwreck
  • Akko Harbour
  • Maritime Archaeology
  • Sub-bottom profiling
  • Survey

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Oceanography
  • Water Science and Technology
  • Acoustics and Ultrasonics
  • Instrumentation

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