The Action reflects Seac design philosophy in pursuit of great ergonomics for performance and the utmost simplicity in user friendliness, while making no compromises on safety. Through the Bühlmann ZHL-16C decompression algorithm, the Seac Action software, when set in SCUBA mode, allows complete and safe management of the dive profile with one or two mixes (air and/or Nitrox with oxygen concentrations up to 99 %). For more advanced users, the GAUGE mode allows you to manage the dive session in total autonomy through the simple depth gauge and stopwatch functions. The LCD screen with adjustable intensity contrast and backlight ensures perfect data control in any conditions of visibility. The users receive warning signals if the MOD is exceeded, if the decompression stop is not respected, and if it is ascended too rapidly. Furthermore, Seac Action calculates the “NoFly” time, tissue desaturation and the maximum level of altitude granted . . . The FREEDIVING mode allows those who enjoy apnea to control dive and surface times, the current depth and the maximum depth reached during the session. All the controls and the relative safety warnings are activated when the user switches from one mode to another. For instance, if the user goes scuba diving in the morning and wants to practice apnea in the afternoon, a safety feature will not activate the FREEDIVING mode as fewer than 12 hours have elapsed since the scuba dive. The users will certainly enjoy the classic Seac style in the Action and Action HR wrist dive computers as they are designed with sporty and yet sober lines, available in colors ranging from total black, to black with white or red details. The Action line is available stainless steel finish with High Resistance details; its bezel, push-buttons and buckle are protected by a treatment that involves the deposition of an ultra-thin vacuum film that makes this wrist dive computer much more resistant to shocks.