About 3H Consulting
3H creates software applications for marine geophysical survey and maritime archaeology. We provide advice and consultancy on maritime archaeology projects and marine geophysical investigations. We also migrate legacy archaeological site information to Site Recorder and provide training in Site Recorder, marine geophysics and underwater fieldwork.
To contact us please send an email to: pete@3HConsulting.com
3H Consulting started in 1997 and is a family organisation based in Plymouth in the South-West of England owned by Peter Holt and Mallory Haas.
Peter Holt
Peter Holt is a Director of The SHIPS Project CIC. Peter spent 20 years with Sonardyne International Ltd. designing subsea navigation systems for the oil industry and military. Since 1989 Peter has worked on maritime archaeology projects all over the world in water depths from the foreshore down to 1200m, and started 3H Consulting Ltd. to provide consultancy and software to the maritime archaeology community. In 2010 Peter founded the SHIPS Project, a wide ranging study of the maritime history of Plymouth, and from 2010 to 2016 it was funded by the US research foundation ProMare. In 2021 The SHIPS Project became a Community Interest Company (CIC), a special type of limited company which exists to benefit the community rather than private shareholders.
Peter has written a number of papers on surveying, geophysics, archaeology, maritime history, GIS and data management and has written and contributed to a number of books on early submarines, marine geophysics, archaeology, shipwrecks and maritime history. Peter was a visiting research fellow at the University of Plymouth from 2010 to 2016, supervising several postgraduate projects each year and he still occasionally lectures there. Peter is a Chartered Engineer, a Member of the Hydrographic Society, he was a Member of the Chartered Institute for Archaeologists and is vice chair of IMASS, the International Shipwreck Conference organising committee. Peter is a commercial diver, pilot for small ROVs and is a Scientific Recovery Expert for the US Defense POW/MIA Accounting Agency.
From 2016 to 2021, Peter was Operations Manager for MSubs Ltd. managing the build of manned submersibles and large uncrewed underwater vehicles then he was the Chief Technology Officer for HydroSurv Ltd., designing and building uncrewed surface vessels (USVs). Peter now works on technology for marine habitat monitoring for Sonardyne International Ltd., he runs The SHIPS Project CIC in Plymouth, occasionally undertakes heritage consultancy work and regularly does public talks about the maritime history of Plymouth.
Recent publications include books about the abandoned hulks and ships on Plymouth's foreshore, the crashed aircraft around Plymouth, a white paper on the history of pollution in Plymouth Sound and a book about Plymouth's first castle.
Mallory Haas
Mallory Haas is an archaeologist who started her career working in public archaeology and is now a Director of The SHIPS Project. She managed several seasons of field schools in the inner city of Cleveland, Ohio, engaging underprivileged youth in historical archaeology, using archaeology as a way to create an interest in science and history. Mallory got involved in diving and maritime archaeology in the Great Lakes in the USA and is now a commercial diver and mixed gas technical diver.
Mallory started working with the SHIPS Project in 2013 and is now director and chief archaeologist for the Project. Mallory is lead for the Stray Finds Project which aims to record objects found underwater and recovered by sports divers. Mallory is also working with the Plymouth Box Museum to develop their shipwreck interactive and produce a new shipwreck chart. The SHIPS Project is developing courses for training sports divers to be shipwreck explorers, bringing more citizen science to underwater heritage. A new venture is the 1000 Tyres Project which aims to help clean up Plymouth Sound by removing tyres and other abandoned junk, and Mallory leads this first environmental initiative by the SHIPS Project.
For the past few years Mallory has worked as a consultant for TV and media, developing and leading investigations on many shipwreck projects in the UK and USA. Mallory most recently was the archaeological advisor to the TV series Enslaved, acting as the Project Archaeologist on many of the shipwreck sites investigated by the series. Mallory continues to be a consultant on a number of media projects being released in 2021. Mallory is a Trained Scientific Recovery Expert for DPAA, the Defense POW/MIA Accounting Agency, and has undergone training with the US Military in Hawaii to be a lead investigator on missions to recover human remains underwater from wrecks or crash sites.
Mallory’s recent work includes collaboration with Mohini Chandra at the Plymouth College of Art on a project called ‘Paradise Lost’ which brings maritime heritage to a wider audience through art. The piece looks at material culture connected to indentureship and slavery to help interpret inconvenient truths about past human actions.
Mallory is an adviser on maritime heritage for the Port of Plymouth Maritime Liaison Committee (PPMLC). Mallory sits on the board of IMASS, the organising committee for the International Shipwreck Conference, is the Engagement Officer for The Big Cannon Project (Ultima Ratio), and was a tutor for The Nautical Archaeology Society (NAS).
Site Recorder 4
Site Recorder 4 was developed from the original 3H software program called Site Surveyor which was developed to overcome some of the problems found when 3D surveying during archaeological fieldwork. Site Surveyor was completed during work on the Resurgam submarine in 1997 and was then used on many underwater archaeology projects all over the world. The complexity of site recording during the excavation of the Dutch East Indiaman Vliegent Hart in 2000 showed that there was a need for a single program that was capable of capturing all of the information about an archaeological site underwater. Site Recorder 3 was developed to fulfil that need and was used on a number of major projects including the Mary Rose excavations in 2003 - 2005. Site Recorder 4 is the next generation in this family of programs.
Site Recorder software has been used on many of the leading marine archaeological projects completed in recent years and is used by institutions, government organisations, commercial companies and universities in more than 23 countries. Site Recorder has also been used for mapping distributions for marine biology, inshore civil engineering, crime scene investigations and recording dinosaur footprints.
Click here to read about major projects that use Site Recorder...
Click here to see who uses Site Recorder...
Our thanks go to these people and organisations who provided photographs and text for this web site: Alex Hildred at the Mary Rose Trust, Jeremy Green and Corioli Souter, Kevin Camidge, Janet Witheridge, Paul Dart, Peter McBride and Sarala Sharma