I. Requirements Analysis

Self-contained diving equipment is designed to meet the needs of public safety divers performing search and rescue missions underwater. These divers require effective collaboration and communication in complex underwater environments to enhance the efficiency and safety of search and rescue operations.

II. Product Features

1. Diving Cylinder: 12L international standard aluminum cylinder with stainless steel valve head, featuring a G5/8 threaded connection. Weight: 12.7kg; Working pressure: 20MPa.

2. Diving Full-Face Mask with Surface Communication System: Includes a 4-channel surface base station and 4 underwater communication transceiver units, featuring 8 communication frequencies with an operational range of 200 meters to 3000 meters. Weight ≤0.25kg (underwater).

3. Full-Face Diving Mask: Features a large viewing window constructed from high-strength PVC material. Equipped with a non-allergenic rubber nosepiece and a dual-seal face gasket. Its low-volume mouthpiece and nosepiece design accommodates most face shapes.

4. Buoyancy Vest: Made of PVC material, inflatable with a secondary regulator, providing 210kg of underwater buoyancy. Features two large front pockets with Velcro closures. CE certified.

5. Fins: Diving-specific fins featuring a traditional front hydrodynamic design, soft-material edges, synthetic rubber, polystyrene, and spring-engine construction.

6. Lead weights: 2kg/piece × 6 pieces; Dimensions: 8 × 8 × 3cm, including lead weight straps with metal buckles, length 140cm.

7. Wet Suit: Constructed entirely from 5mm thick high-performance compressed neoprene material, featuring a durable back zipper and slip-resistant, abrasion-resistant coating on the knees.

8. Diving Hood: Designed for use with diving suits, this hood provides head protection for firefighters during underwater rescue operations.

9. Diving Boots: An internationally renowned brand, crafted from premium rubber material. Featuring a sealed design and slip-resistant tread pattern, they are easy to maintain and machine washable.

10. Diving Knife: Overall length 26cm, blade length 12.5cm, with quick-release buckle and two rubber leg straps, hard plastic sheath.

11. Diving Flashlight: Constructed from aerospace-grade aluminum alloy with military-grade Type III hard anodized coating for abrasion and corrosion resistance. Runtime: 2 hours (high brightness) - 18 hours (low brightness). Charging time: 150 minutes.

12. Nasal congestion: Prevent water from entering the nose during underwater rescue operations.

13. Dive Watch: Five dive modes, steel case with anti-reflective sapphire crystal glass, integrated tilt-compensated 3D digital compass.

14. Regulators: Primary regulator operating pressure 200 bar, operating flow rate 2010 L/min; secondary regulator operating pressure 9.5 bar.

15. Electric Air Compressor: Imported ATLAS all-aluminum alloy compressor head, airflow: 552 L/min, working pressure: 15 bar, imported motor power: 5.5 kW.

III. Application Scenarios:

Search and Rescue Operations: Public safety divers can easily receive and track the locations of other divers while performing underwater search and rescue missions using this equipment.

Teamwork: This equipment facilitates efficient collaboration among divers during complex underwater operations.

Emergency Rescue: In critical situations, this equipment enables divers to rapidly locate targets, enhancing rescue efficiency.

IV. Technical Specifications

Serial Number	Project Name	Technical Specifications
1	Diving cylinder	12L international standard aluminum cylinder with stainless steel head, featuring a G5/8 threaded connection, weighing 12.7kg; operating pressure 20MPa.
2	Diving Full-Face Mask with Surface Communication System	Includes a 4-channel surface base station and 4 underwater communication transceiver units, featuring 8 communication frequencies with an operating range of 200 meters to 3000 meters, and a weight ≤0.25 kg (underwater).
3	Full-face diving mask	Large-view design, constructed from high-strength PVC material, featuring a non-allergenic rubber nose cup and dual-seal facial fit. The low-volume mouthpiece and nasal openings accommodate most face shapes.
4	Buoyancy Vest	PVC material, inflatable with a secondary regulator, underwater buoyancy 210kg. Features two large pockets with Velcro closures on the front flap. CE certified.
5	flippers	Diving fins, traditional front hydrodynamic design, soft material edges, synthetic rubber, polystyrene, spring-engine design.
6	压铅	2kg/block × 6 blocks; Dimensions: 8 × 8 × 3cm, includes lead tape with metal buckle, length 140cm.
7	Wet suit	Constructed entirely from 5mm thick high-performance compressed neoprene material, featuring a durable back zipper and slip-resistant, abrasion-resistant coating on the knees.
8	Diving hood	Can be used with diving suits to provide head protection for firefighters during underwater rescue operations.
9	Diving boots	Internationally renowned brand, crafted from premium rubber material, featuring a sealed design and anti-slip texture. Easy to maintain and machine washable.
10	Diving knife	Total length: 26cm, blade length: 12.5cm, features a quick-release buckle and two rubber leg straps, hard plastic sheath.
11	Diving flashlight	Aviation-grade aluminum alloy with military-grade Level 3 hard anodized finish for enhanced wear and corrosion resistance. Operating time: 2 hours (high luminous flux) - 18 hours (low luminous flux). Charging time: 150 minutes.
12	Nasal congestion	Prevent water from entering the nose during underwater rescue operations.
13	Diving watch	Five diving modes, steel case, and sapphire crystal glass with anti-reflective coating, integrated tilt-compensated 3D digital compass.
14	regulator	The primary regulator operates at a working pressure of 200 bar and a flow rate of 2010 L/min. The secondary regulator operates at a working pressure of 9.5 bar.
15	Electric Air Pump	Imported ATLAS all-aluminum alloy air compressor head, Airflow: 552 L/min, Working pressure: 15 bar, Imported motor power: 5.5 kW.