An immersion suit also called a survival suit is a life-saving garment designed to keep seafarers protected in the event of abandoning ship, especially in cold waters. Made of insulated, waterproof material, it drastically slows body heat loss and increases chances of rescue.

Purpose
• Thermal Protection: Retains body heat to prevent hypothermia.
• Buoyancy: Keeps the wearer afloat without the need to swim.
• Visibility: High-visibility color and reflective tape help rescuers locate survivors quickly.
• Survivability: Protects against wind, waves, and freezing temperatures while awaiting rescue.

Parts and Their Descriptions
1. Neoprene Face Seal – Forms a watertight seal around the face to prevent cold water entry.
2. Neoprene Face Cover – Shields the head and face from harsh weather and sea spray.
3. Whistle – Built-in signaling device for attracting attention during emergencies.
4. Buddy Line – Cord used to connect survivors together in the water to avoid drifting apart.
5. SOLAS-Approved Reflective Tape – Enhances visibility during low light or searchlight operations.
6. Webbing Loops – Provide attachment points for lifting or securing.
7. Pocket for Glove – Convenient storage for gloves when not in use.
8. Glove Attachment Cord – Prevents gloves from being misplaced or lost in rough seas.
9. Lined Rubber Glove – Ensures waterproof protection for hands.
10. Neoprene Over Glove – Adds insulation and flexibility for handling objects.
11. Metal Dry Zip – Creates a fully watertight closure to prevent leaks.
12. Buckle – Secures the suit tightly and comfortably around the body.
13. 50mm Nylon Lifting Harness – Reinforced strap for safe lifting or hoisting during rescue.
14. Lifting Loop – Attachment loop for rescue hooks and lifting gear.
15. Seams on Critical Areas (Tape Reinforcement) – Strengthened to resist tearing or leakage.
16. 5mm Fire-Retardant Double-Lined Neoprene – Main insulating material that resists cold and offers some flame protection.
17. Neoprene Ankle Adjuster – Tightens around ankles to reduce water entry.
18. Reinforced Foot Protector – Provides durability and grip on wet or rough surfaces.

Maintenance and Care

To ensure reliability, every immersion suit must be regularly inspected, cleaned, and stored correctly:
• Monthly Check: Inspect for tears, punctures, or stiff zippers.
• Seal & Zip Care: Lubricate the metal zipper lightly with silicone grease to prevent corrosion.
• Drying: Rinse with fresh water after use or inspection; air dry in a shaded, ventilated area—never use direct sunlight or heat.
• Storage: Keep in a cool, dry location away from sharp objects, oils, or chemicals.
• Annual Testing: Conduct inflation and leak tests (if applicable) as required by company or SOLAS standards.
• Training: Crew should practice donning the suit regularly to ensure quick and correct use in real emergencies.