Why dont submarines have portholes or external cameras that will allow them to see whats around them? Why rely solely on sonar? Can't they add a visual capability? - Quora
Why don't submarines use visual ports & cameras instead of relying only on periscopes? - Quora
Sailor faces charges for submarine photos on cell phone
The Nikon SLRs built for the US Navy's hunter-killer submarines - Kosmo Foto
Do military submarines have underwater lights and cameras? Why or why not? Deep water research vessels have them. - Quora
Why do modern submarines still have periscopes? - Quora
Submarine Detection and Monitoring: Open-Source Tools and Technologies
New US, British Navy Submarines Have New Kind of Periscope
France's new 5,181-ton nuclear submarine has no traditional periscope. Here's how that works.
Israel's Submarine Secret: New Dolphin-IIs Could Have VLS - Naval News
I FiNALLY SEE FiSH! NEW CAMERA - Underwater Exploration w/ FiFiSH v6 ROV SUBMARiNE | RC ADVENTURES - YouTube
submarine - Kids | Britannica Kids | Homework Help
Do military submarines have underwater cameras?
Virginia-class submarine - Wikipedia
TTRobotix introduces TTR-SB Seawolf submarine for GoPro cameras: Digital Photography Review
Are submarines still equipped with traditional periscopes, or do they use something different? - Quora
Navy orders additional submarine electro-optical imaging sensors from Lockheed Martin | Military Aerospace
Remote Control Submarine Turns A GoPro Into An Aquanaut | Popular Science
The eyes of a submarine
Israel Has German-Built Nuclear Missile Submarines
Submarine Vs. Submersible: Difference Matters for Missing Titanic Tourists
Do modern submarines have a way to see (visually) what's happening outside while submerged? - Quora
Means of deployment of marine special forces
