Table 1.

Modelling results from linear mixed effects models used to assess correlations between abstracted (response) and archival (explanatory) estimates for (a) depth associated and (b) accelerometry data. Intercept and slope values close to 0 and 1, respectively, reflect stronger correlations/likeness between the two data types than those far from 0 and 1. Intercept and slope standard deviation values of each model's random component (R. intercept and R. slope) are reported to evaluate inter‐individual differences in algorithm performances. Pseudo R ² values show the amount of variation accounted for by the fixed component of the model (marginal R ²; $R_{\mathrm{m}}^2$). and the amount of variation accounted for by random component of the model ($R_{\mathrm{c}}^2$ (conditional R ²) − $R_{\mathrm{m}}^2$). Root mean square errors are shown for the fitted values of the model vs. the retrieved archival data (RMSE _mod), and the transmitted estimates vs. retrieved archival data (RMSE _data; standardised out with brackets and raw within brackets)

	Intercept	Slope	R. intercept	R. slope	$R_{\mathrm{m}}^2$	$R_{\mathrm{c}}^2$ − $R_{\mathrm{m}}^2$	RMSE mod	RMSE data
(a) Depth associated data comparison
Phase duration
Descent phase	0.01	0.97	—	—	.949	—	0.03	0.11 (20.84 s)
Bottom phase	0.01	0.99	.01	.01	.978	<.001	0.01	0.17 (31.87 s)
Ascent phase	0.00	0.93	.03	.04	.904	.002	0.05	0.14 (25.86 s)
Vertical speed
Descent phase	0.06	0.93	.03	.02	.914	.004	0.03	0.08 (0.10 m/s)
Bottom phase	—	—	—	—	—	—	—	—
Ascent phase	−0.03	0.91	.02	.02	.922	.003	0.06	0.09 (0.11 m/s)
Depth
Descent phase	—	—	—	—	—	—	—	—
Bottom phase	−0.02	1.00	.01	—	.993	<.001	0.02	0.09 (9.69 m)
Ascent phase	—	—	—	—	—	—	—	—
(b) Accelerometry data comparison
PrCA
Descent phase	−0.08	0.69	.06	.12	.462	.016	0.10	0.21 (3.19 s)
Bottom phase	0.36	0.69	.11	.05	.650	.012	0.52	0.91 (13.98 s)
Ascent phase	0.00	0.75	.09	.16	.521	.037	0.13	0.23 (3.51 s)
Swimming effort
Descent phase	3.92	4.13	.33	.33	.858	.016	1.32	1.33 (8.99 m/s3)
Bottom phase	5.00	5.04	.76	.79	.734	.038	1.86	1.93 (13.00 m/s3)
Ascent phase	3.43	3.57	.38	.47	.846	.035	1.76	1.79 (11.20 m/s3)
Pitch
Descent phase	−0.26	0.72	.09	.10	.599	.020	0.05	0.12 (3.78°)
Bottom phase	—	—	—	—	—	—	—	—
Ascent phase	0.11	0.90	.03	.03	.886	.003	0.04	0.11 (2.83°)