A considered survey design will generate data that are representative of the population that the sample is taken from. All good design takes is a little thought, some information and some good software tools.

Spatially balanced randomisation with unequal inclusion probabilities is a modern and efficient design method. These designs are embedded within sampling theory and should be easy to generate.

The R-package MBHdesign allows field researchers easy access to these designs. It implements point-based and transect-based methods and allows for the incorporation of legacy sites.

The functionality of the package is illustrated with example designs in an environmentally heterogeneous region.

1. Baited remote underwater stereo-video systems (stereo-BRUVs) are a popular tool to sample demersal fish assemblages and gather data on their relative abundance and body size structure in a robust, cost-effective and non-invasive manner. Given the rapid uptake of the method, subtle differences have emerged in the way stereo-BRUVs are deployed and how the resulting imagery is annotated. These disparities limit the interoperability of datasets obtained across studies, preventing broadscale insights into the dynamics of ecological systems. 

2. We provide the first globally accepted guide for using stereo-BRUVs to survey demersal fish assemblages and associated benthic habitats.

3. Information on stereo-BRUVs design, camera settings, field operations and image annotation are outlined. Additionally, we provide links to protocols for data validation, archiving and sharing.

4. Globally, the use of stereo-BRUVs is spreading rapidly. We provide a standardized protocol that will reduce methodological variation among researchers and encourage the use of Findable, Accessible, Interoperable and Reusable workflows to increase the ability to synthesize global datasets and answer a broad suite of ecological questions.