Items in each category are ordered roughly from accessible to advanced. Anything marked [free] is available online at no cost; anything marked [textbook] is a purchased reference book. URLs are stable as of the version date of this handbook; if a link is dead, the topic search terms still apply.
Photogrammetry: Foundations
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Wikipedia: "Photogrammetry," "Structure from Motion," "Bundle Adjustment." [free] Useful entry-level overviews.
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Agisoft Metashape User Manual. [free] Available from agisoft.com. Despite being a software manual, the workflow sections are a strong practical introduction to modern photogrammetry.
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Linder, W. "Digital Photogrammetry: A Practical Course." Springer. [textbook] Standard accessible-level introduction.
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Luhmann, T. et al. "Close-Range Photogrammetry and 3D Imaging." Walter de Gruyter. [textbook] Comprehensive reference; advanced.
Underwater Photogrammetry Specifically
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Drap, P. et al. Multiple papers on underwater photogrammetry for archaeology. Search "underwater photogrammetry calibration" in the ISPRS Archives. [free]
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The Nautical Archaeology Society publishes accessible introductions to wreck-site documentation, including photogrammetric methods. nauticalarchaeologysociety.org. [free briefings, paid courses]
Bathymetry and Hydrography
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Deeper Sonar Support. support.deeper.eu. [free] Specific to your gear; read the bathymetric mapping articles in detail before the course.
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ReefMaster Documentation. reefmaster.com.au. [free] The processing software you will use during surface intervals.
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International Hydrographic Organization, Standards for Hydrographic Surveys (S-44). iho.int. [free] The professional standard; useful for understanding what survey-grade actually means and how recreational mapping compares.
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NOAA Office of Coast Survey. nauticalcharts.noaa.gov. [free] U.S. hydrographic standards and educational material.
Underwater Optics
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Wikipedia: "Snell's Law," "Total Internal Reflection," "Refractive Index of Water." [free]
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Edge, M. "The Underwater Photographer." Focal Press. [textbook] Practical optics for underwater shooting; covers flat vs dome port behavior.
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Treibitz, T. and colleagues. Papers on "flat refractive geometry." Search the journal Computer Vision and Image Understanding. Advanced; mathematically rigorous treatment of how flat ports affect calibration.
Registration and 3D Data Fusion
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Wikipedia: "Iterative Closest Point." [free] Best plain-language introduction to ICP.
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Open3D library documentation. open3d.org. [free] Python library with worked tutorials on point cloud registration; if you have Python on your laptop, this is the fastest way to get hands-on experience.
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CloudCompare. cloudcompare.org. [free] Open-source GUI tool for visualizing and aligning point clouds and meshes. Useful for understanding what registration looks like without writing code.
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OpenDroneMap / WebODM documentation. opendronemap.org. [free, open-source] Useful for understanding orthomosaic workflows and the limits of nadir-only image sets.
Marine Archaeology and Cultural Resource Law
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NOAA Office of National Marine Sanctuaries. sanctuaries.noaa.gov. [free] Authoritative source for U.S. waters.
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U.S. Sunken Military Craft Act (2004). Full text available on Congress.gov. [free] Read at least the definitions section before mapping anything that could be a military wreck.
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UNESCO 2001 Convention on the Protection of the Underwater Cultural Heritage. unesco.org. [free] Background on the international regime, including which countries are signatories.
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Society for Historical Archaeology. sha.org. [free briefings] Professional society for historical and underwater archaeology; useful ethical framework.
Diving Safety, Task Loading, and Physiology
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Divers Alert Network (DAN). dan.org. [free articles, membership for full resources] Authoritative source on dive medicine and incident analysis.
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Your PADI Enriched Air (Nitrox) Diver and PADI Peak Performance Buoyancy materials. Refresh these before the course — you will rely on both.
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Buzzacott, P. et al. "Annual Diving Report" series, DAN. [free] Statistical context for diving risk; useful for understanding why this course's mitigations exist.
Communities and Ongoing Practice
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ReefMaster user community forum. reefmaster.com.au forum. [free] Active community of recreational bathymetric mappers; useful for processing questions.
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OpenROV / Trident community. openrov.com (community-supported as of last check). [free] Underwater robotics community with significant overlap in mapping interests.
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OpenAerialMap. openaerialmap.org. [free] If you produce orthomosaics worth sharing, this is one venue.
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r/UWPhotography and r/scuba on Reddit. Practical communities, variable signal-to-noise but useful for equipment and technique questions.