The following are known Game Genie Codes for Silent Service on Nintendo Entertainment System (NES).

• Start With 50 Deck Gun Shells
  ZLEPOIAI
• Start With 99 Deck Gun Shells
  LTEPOIAI
• Infinite Deck Gun Shells
  SZXVOPVG
• Infinite Bow Torpedoes
  SZSVUPVG
• Infinite Aft Torpedoes
  SXETUPVG
• Increases Max Submerged Speed From 10 To 29
  YXVPUYGP
• Increases Max Surfaced Speed From 20 To 50
  GUSOXNTO
• Infinite Battery Power
  SZSPKLVG
• Don’t Sink From Depth Charges (Your Sub Can Still Be Damaged, But You Won’t Sink)
  SXOPUGSA