We present a new gridded bathymetric compilation around Tristan da Cunha here defined by the following bounding box: 5 to 16.8W, 33 to 43.5S. This bathymetry grid was compiled from a variety of multibeam swath bathymetry data acquired during 7 different cruises (see lineage). The data is available as a grid of 0.001 degrees resolution in three different formats: NetCDF, ArcView ASCII and GeoTIFF formats using geographic coordinates on the WGS84 datum. This grid is an output of the UK FCDO ''Blue Belt'' program and the following Natural Environment Research Council (NERC) BAS-ODA fundings: NE/R000107/1 and NE/T012439/1.

Global Positioning System (GPS Pathrack) data loggers were attached to breeding northern rockhopper penguins during incubation, guard and creche stages between September to December 2016 on Nightingale (37 deg 25''S, 12 deg 28''W; 4 km2) and Inaccessible (37 deg 17''S, 12 deg 40''W; 14 km2) islands. Tracking data successfully augmented and complement existing data sets for the species breeding in the South Atlantic, which enable us to systematically identify areas of particular relevance for this species and thus to help determining whether there is a need to improve marine spatial planning in form of e.g. Marine Protected Areas in the island''s EEZ. There are two data types for each penguin a) the unprocessed raw and b) the processed GPS data (details below). All files are in the CSV format. Data were collected as part of the Darwin Plus funded Project Pinnamin, 2016 - 2018.

In 2016, 100 northern Rockhopper penguin nests were marked in the main colony on Nightingale Island (37.254 deg S, 12.2832 deg W) and an additional 50 nests in a small satellite colony (37.252 deg S, 12.2833 deg W). Nests were followed from egg-laying to the creching stage to monitor breeding success and to investigate the impact of colony size as one of the possible drivers of breeding success. Data were collected as part of the Darwin Plus funded Project Pinnamin, 2016 - 2018.

Three hundred adult northern rockhopper penguins, Eudyptes moseleyi, and 100 chicks were implanted with PIT tags in the breeding season 2016/17, and 130 adults in 2017/18 on Nightingale (37 deg 25''S, 12 deg 28''W). To monitor annual survival two automated PIT readers were installed on each of the main pathways penguins use to commute between the sea and their colonies. There are two files comprising a) the list of PIT tags implanted and b) the reader crossings during from September 2016 to January 2018. Data were collected as part of the Darwin Plus funded Project Pinnamin, 2016 - 2018.

Temperature depth devices (TDR) were attached to northern rockhopper penguins breeding on Nightingale (37 deg 25''S, 12 deg 28''W) to investigate temporal differences in diving behaviour throughout the species'' breeding cycle. The data sets comprise the unprocessed pressure and temperature data for each bird in .csv format. Data were collected as part of the Darwin Plus funded Project Pinnamin, 2016 - 2018.

Geolocators (GLS) were attached to northern rockhopper penguins breeding on Nightingale Island (37 deg 25 S, 12 deg 28 W: 4 km2) with the aim to study the species'' dispersal in the inter-breeding period, 2017. This data successfully augmented and complemented existing datasets for the species breeding on Nightingale Island and enhanced our understanding of the species'' distribution at sea throughout their annual cycle. There are four different data types for each penguin a) the unprocessed light sensor data, b) the unprocessed activity (wet/dry) data, c) the unprocessed temperature data and d) the estimated positions using the BAStag and SGAT packages in R. Data were collected as part of the Darwin Plus funded Project Pinnamin, 2016 - 2018.