Published by SeaWarrior Applications on Aug 27, 2024

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About Shellback

1. Operations: Includes information and training on bridge management, navigation basics, watch team tools, crew endurance, operating procedures for air-capable ships, Air Certification for Naval Surface Force Ships, and manuals for amphibs, maintenance, and other general ship operation resources.

2. Medical: Includes the Manual of the Medical Department, information on medical and physical readiness, mental health, Medical Evaluation Board procedures, the Disability Evaluation System, family member readiness, and more.

3. Shellback, formerly known as eDivo, is a free mobile app developed to support US Naval Surface Force (SURFOR) personnel in an easy-to-access offline environment.

4. Shellback provides Sailors the ability to download key SURFOR information on their own portable devices and access it while underway without the need for an internet connection.

5. Also includes legal handbooks and manuals, resources for Surface Warfare Officers, and a variety of general personnel management resources.

6. Safety: Provides documents related to lessons learned, mishap reporting, notices, safety-related awards, and general safety resources.

7. Shellback provides the most relevant and current information to SURFOR Sailors in one location.

8. In naval tradition, a Shellback is a nickname for a Sailor who has crossed the Equator and thus transitioned from a novice Sailor, or Pollywog, to an experienced Sailor.

9. Admin/Training: Contains the Correspondence Manual and the SURFOR Training and Readiness Manual.

10. Personnel Management: Provides documents on Navy personnel policy and administration.

11. Content is scheduled for annual updates.

Shellback Customer Insights

1. The Rules of the Road quiz now no longer tells you which answers are correct, making it essentially useless for studying and trying to learn the Rules of the Road.

2. Best of all, it will give you the correct answer to a question you missed to help with studying.Rules of the Road Quiz is not useful.

3. Classic case of "fixing" something that wasn't broken, and breaking it in the process.ROR quiz on this app no longer gives you correct answer.

4. Also please add the DAPA instruction the 5350.4D.Good, but Rules of the Road needs to update.

5. This is not an effective tool for study or improvement.Very bad update when it changed from eDivo to Shellback.

6. Ror quiz does not provide correct answers.

7. Doesn't open half the time, doesn't download the required update to use the app when it does, can't get past the disclaimer.

8. Whoever created the Shellback update also decided to remove most of the references and links.

9. Whose idea was it to make such a bad change?Ror quiz sometimes refered to diagram numbers instead of giving images.

10. Hot garbage after the update from Edivo to "shellback," but then what else is new with military software.

11. Once you complete the quiz, this is no feedback just completion information.

Steps to Troubleshoot & Fix Shellback Issues

1. Fix Shellback Not Working/Crashes/Errors/Unresponsive & Black/White screen:


  1. Restart Shellback: Restarting the app will resolve most errors.
  2. Update the Shellback App. Here is how:
    1. On Android goto PlayStore » Search for "Shellback" » Open Shellback » click "Update".
    2. On iPhone, goto AppStore » Your profile » Available Updates » Check for Shellback » click "UPDATE".
  3. Clear Shellback app cache: Clearing cached data will force your app to retrieve the latest data directly from Shellback servers.
    1. On Android, goto Settings » Apps » Select "Shellback" » click Storage » click "Clear Cache".
  4. Check Shellback app permissions. If any of these permissions required to use your device's features are disenabled, Shellback might not work.
  5. Uninstall and reinstall Shellback. If nothing else has worked, completely uninstall Shellback then reinstall.
  6. Restart your device. Last, restarting your device can often clear most problems causing Shellback not working


2. Fix Shellback Server issues & Internet Connection


  1. Check network connection: An unstable Internet will make Shellback be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
  2. Disable VPN: VPN can cause connection errors and lead to Shellback not working. Make sure all VPNs are off
  3. Enable background data: When Background data is turned off, Shellback may not be able to connect to the Internet when running in the background.

Reported Issues