<div>The Abbot Point to Hydrographers Passage bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the RV Escape during the period 6 Oct 2020 – 16 Mar 2021. This was a contracted survey conducted for the Australian Hydrographic Office by iXblue Pty Ltd as part of the Hydroscheme Industry Partnership Program. The survey area encompases a section of Two-Way Route from Abbot Point through Hydrographers Passage QLD. Bathymetry data was acquired using a Kongsberg EM 2040, and processed using QPS QINSy. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>

In November, 2018 a workshop of experts sponsored by UNESCO’s Intergovernmental Oceanographic Commission was convened in Wellington, New Zealand. The meeting was organized by Working Group (WG) 1 of the Pacific Tsunami Warning System (PTWS). The meeting brought together fourteen experts from various disciplines and four different countries (New Zealand, Australia, USA and French Polynesia) and four observers from Pacific Island countries (Tonga, Fiji), with the objective of understanding the tsunami hazard posed by the Tonga-Kermadec trench, evaluating the current state of seismic and tsunami instrumentation in the region and assessing the level of readiness of at-risk populations. The meeting took place in the “Beehive” Annex to New Zealand’s Parliament building nearby the offices of the Ministry of Civil Defence and Emergency Management. The meeting was co-chaired by Mrs. Sarah-Jayne McCurrach (New Zealand) from the Ministry of Civil Defence and Emergency Management and Dr. Diego Arcas (USA) from NOAA’s Pacific Marine Environmental Laboratory. As one of the meeting objectives, the experts used their state-of-the-science knowledge of local tectonics to identify some of the potential, worst-case seismic scenarios for the Tonga-Kermadec trench. These scenarios were ranked as low, medium and high probability events by the same experts. While other non-seismic tsunamigenic scenarios were acknowledged, the level of uncertainty in the region, associated with the lack of instrumentation prevented the experts from identifying worse case scenarios for non-seismic sources. The present report synthesizes some of the findings of, and presents the seismic sources identified by the experts to pose the largest tsunami risk to nearby coastlines. In addition, workshop participants discussed existing gaps in scientific knowledge of local tectonics, including seismic and tsunami instrumentation of the trench and current level of tsunami readiness for at-risk populations, including real-time tsunami warnings. The results and conclusions of the meeting are presented in this report and some recommendations are summarized in the final section.

<div>The Banks Strait Reference Surfaces bathymetry survey was acquired for the Australian Hydrographic Office (AHO) on 17 Dec 2021. This surface was created from a contracted national reference survey within Banks Strait to Cape Barren, TAS, collected for the purpose of calibrating multibeam echosounders.&nbsp;It was conducted for the Australian Hydrographic Office as part of the Hydroscheme Industry Partnership Program, acquired using Kongsberg EM 2040 MkII and Kongsberg EM 2040P, and processed using QPS Qimera. A grid in 0.5m resolution is provided for the surveyed site within this survey area in MSL, LAT and Ellipsoid vertical datum. The dataset was then exported as a 0.5m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>

The Solitary Islands Gumbaynggirr Yaegl MP bathymetry survey was acquired by the NSW government (Department of Planning and Environment – DPE) onboard the RV Bombora during the period 31 Aug 2022 – 31 Jul 2023, using DPE’s R2Sonic 2022 multibeam sonar. The survey was completed as part of the SeabedNSW program funded by NSW government through Coastal Reforms (>2015), HabMap Program funded through Marine Parks Authority (now under Marine Estate Management Authority) or through collaborations with partner agencies or institutions. The purpose of the project was to 1) provide a baseline dataset and 2) map the spatial distribution of seabed types. This dataset contains 32-bit floating point geotiff files of bathymetry and backscatter in 5m resolution for the study area, derived from the processed Hypack, R2Sonic GUI, POSView, POSPac, Qimera and FMGT software. General details on vessel setup, mobilisation and processing are provided at https://www.environment.nsw.gov.au/-/media/OEH/Corporate-Site/Documents/Research/Our-science-and-research/seabed-nsw-standard-operating-procedures-multibeam-surveying-190101.pdf with survey specific details in the Survey Report and DPIE Rigor Statement (can be provided upon request). This dataset is not to be used for navigational purposes.

<div>The Banks Strait to Cape Barren bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the MV Offshore Solution during the period 29 November 2021 – 19 April 2022. This was a contracted survey conducted for the Australian Hydrographic Office by Ocean Infinity Australia as part of the Hydroscheme Industry Partnership Program. The survey area encompases an area within Banks Strait to Cape Barren, Tasmania. Bathymetry data was acquired using a Kongsberg EM2040 MKII and a Kongsberg EM2040P, and processed using QPS Qimera processing software. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>

<div>The Camden Sound (North-West) bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the MV Ocean Dynasty and MV Empress during the period 21 September 2021 – 9 Jan 2022. This was a contracted survey conducted for the Australian Hydrographic Office by MMA Offshore as part of the Hydroscheme Industry Partnership Program. The survey area encompases an area North West of Camden Sound, Western Australia. Bathymetry data was acquired using a Kongsberg EM2040P Mk II and processed using QPS Qimera V2.0.1 processing software. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>

<div>The Flinders Island bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the MV Offshore Surveyor during the period 16 December – 13 May 2022. This was a contracted survey conducted for the Australian Hydrographic Office by Guaridan Geomatis Pty Ltd as part of the Hydroscheme Industry Partnership Program. The survey area encompases an area North East of Flinders Island, Tasmania. Bathymetry data was acquired using a Kongsberg EM2040-07 MKII and processed using CARIS HIPS & SIPS processing software. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>

The Approaches to Darwin, Beagle Gulf bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the M/V Limitless and PHS Zephyr during the period 26 June – 30 August 2020. This was a contracted survey conducted as part of the HydroScheme Industry Partnership Program (HIPP). The survey area lies North-West of Cox Peninsula, encompassing South Gutter and is bounded by North Gutter, Fenton Patches and Fish Reef. Bathymetry data was acquired using a Kongsberg R2Sonic 2026 and R2Sonic 2024 and processed using QPS Qimera V2.0.1. The dataset was then exported to GeoTIFF using CARIS HIPS and SIPS software. This dataset contains a 30m-resolution 32-bit floating point GeoTIFF file. This dataset is not to be used for navigation.

<div>The Van Diemen Gulf (North-West Inshore Route) bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the MV Offshore Guardian and the MV Speical Order during the period 26 Jun 2021 – 5 Oct 2021. This was a contracted survey conducted for the Australian Hydrographic Office by Guardian Geomatics as part of the Hydroscheme Industry Partnership Program. The survey area encompases an area in Van Diemen Gulf (North-West Inshore Route), NT. Bathymetry data was acquired using a Kongsberg EM2040-07 MKII, and processed using CARIS HIPS and SIPS processing software. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>

<div>The Cape Leeuwin bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the MV Mermaid Searcher during the period 5 Dec 2022 – 4 Apr 2023. This was a contracted survey conducted for the Australian Hydrographic Office by MMA Offshore as part of the Hydroscheme Industry Partnership Program. The survey area encompases an area in Cape Leeuwin, WA. Bathymetry data was acquired using a Kongsberg EM2040P, and processed using CARIS HIPS and SIPS processing software. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>