## 2 Materials and Methods  
### Tag Deployment  
Twenty-seven white sharks were dual-tagged with PSATs (MiniPAT; Wildlife Computers Inc., Redmond, WA, USA) and V16-6L acoustic transmitters (InnovaSea, Marine Systems Canada, Inc., Halifax, Nova Scotia; transmission intervals 40-80 s, 10-year battery life). Nineteen of the 27 sharks were also tagged with SPOT tags (Wildlife Computers, Inc, Redmond, WA, USA) as part of a wider research program. Transmitters were fitted to sharks between 17 August 2017 and 27 July 2019. Tagging operations were conducted in NSW coastal shelf waters between Lennox Head (28.80\({}^{\circ}\) S 153.59\({}^{\circ}\) E) and Forster (32.18\({}^{\circ}\) S 152.51\({}^{\circ}\) E) within \(\sim\)0.5 km of the coast. Sharks were caught using Shark Management Alert in Real Time (SMART) drumlines [30], brought alongside the boat and secured with belly and tail ropes following capture. Prior to release, sharks were sexed (based on the presence or absence of claspers) and measured to the nearest centimetre for fork length (FL) using a measuring tape stretched from the tip of the snout to the fork of the tail. Typically, sharks were restrained for less than 20 min before release. Each shark was assigned a unique ID number. Since all sharks in this study are part of a jurisdictional dataset, the numbering of individual sharks is not consecutive. Acoustic transmitters were either surgically implanted into the abdominal cavity following the general procedure of [PERSON] et al. [31] (\(n=13\)) or externally attached by embedding nylon umbrella Domeier anchors into the dorsal musculature using applicator needles mounted on a hand-shaft (\(n=12\)). Three sharks that were originally tagged internally were recaptured and fitted with an additional external acoustic transmitter as part of a wider tracking program. PSATs (12 cm length, volume: 60 cm\({}^{3}\)) were tethered using a 15 cm filament of 1.3 mm diameter stainless steel wire covered with black heat shrink and crimped at either end. On sharks that were also tagged with SPOT tags (\(n=19\)), PSATs were deployed in two different ways; in conjunction with (\(n=7\)) or separate from SPOT tags (\(n=12\)). For the former, a template was used to make four holes (4 mm diameter) on the leading edge of the fin, as high up as possible while retaining support from the fin structure of each shark. Stainless steel bolts (4 mm \(\times\) 50 mm) were then pushed through these holes. The lower right bolt was simultaneously passed through the tether loop of the MiniPAT and the device was secured on the opposite side of the fin with lockers and lock nuts (Figure S1A). For the latter, the PSATs were deployed either by pushing stainless steel bolts through a hole, ca. 2 cm from the base of the SPOT tag and securing the tag on the opposite side of the fin with a locker and a lock nut (\(n=6\)) (Figure S1B), or by implanting a Domeier anchor into the basolateral dorsal musculature using a handheld tagging pole (\(n=6\)) (Figure S1C). PSATs on sharks that were not tagged with SPOT tags were secured by the same methods; i.e., either lockers and nuts or Domeier anchors. PSATs were inserted at an angle of 45 towards the shark's head, which ensured that the tag trailed behind the fin.