SIRIUS HUNTER – The Ultimate Spearfishing and Freediving Computer

The Mares SIRIUS HUNTER is a rugged spearfishing dive computer designed for passionate underwater hunters.
Built to perform in every environment, it combines robust construction, advanced freediving features, and intuitive operation — the ideal companion for both apnea training and deep-sea adventures.
Key Features
• Extremely robust build – reinforced case, high-resistance materials, and tactile buttons for use in any underwater hunting condition
• Large, clear mineral glass display – 1.3" diagonal (33 mm), chip-on-glass technology for optimal visibility
• Simple two-button menu – fast, intuitive navigation, even with gloves
• Freediving training & pool functions – chrono, countdown, lap timer, silent mode for full concentration
• Deep sequential alarms – developed for advanced equalization techniques
• Comprehensive freedive logbook – records up to 10 hours of profile at 0.5-second sampling rate; visualize dives in the Mares/SSI App
• Bluetooth connectivity – update firmware, upload dives, and review graphs directly on your smartphone
• User-replaceable battery (CR2450) – 200–300 hours of use
• Interchangeable straps – replace with bungee (sold separately)
• Daily use watch functions – date, time, alarm, time zone

Why choose the SIRIUS HUNTER
Whether you’re training for apnea performance or exploring deep spearfishing grounds, the SIRIUS HUNTER freediving computer delivers reliability and precision you can count on.
Developed and tested by spearfishers, it reflects the Mares commitment to “Innovation with Purpose” - technology that connects you closer to the ocean.
“Built by spearfishers, for spearfishers.” – Paolo Acanti, Mares Product Manager and passionate spearfisher.

 Facts

Battery type                                                    CR2450
Battery duration                                             Approx. 200 – 300 hours of diving
Max. displayed depth                                   100 m / 328 ft
Ascent rate indicator (m/min - ft/min)       no
Gas switching                                                 no
Stopwatch                                                       yes
Watch                                                               yes
Dual Time                                                        no

Daily Alarm                                                     yes
Plan Mode                                                       no

Choice of Metric / Imperial units               yes
Fresh and Seawater Settings                      yes
Residual Nitrogen Reset                              no
Option To Exclude Audible Alarms            yes
Exclusion of "Uncontrolled Ascent"           no
Altitude Adjustment                                     yes
Resolution                                                      0.1m until 99.9m and 1m at depth deeper thanResolution  ft is always 1ft

depth                                                               -10 °C to +50 °C / 14 °F to 122 °F

Logbook Memory                                           200 hours of dive profile at a 0.5-second sampling rate
Clock                                                                Quartz clock, time, date
Upgradeable software                                   yes
Air integrated                                                  no
Graphic and Numeric Tank Pressure          no

USB Charger                                                    no