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MANUALS

OWNER'S

FROG300's Adjustments, Functions, and Maintenance. All you need Know, and the How.

Here you find the FROG300 basic operations, but to understand and know everything about your FROG300, you need to download complete FROG300 Owner's manual in PDF. It's very important that you do so because, in addition to getting to know it in depth, you'll learn about the scope of the international warranty and any technical details.Enjoy it!  

BASIC KNOWLEDGE

ADJUSTING TIME, GMT,
AND CALENDAR

USING THE DIVE TIME CROWN

FKM STRAP ADJUSTMENT 

MYOX© APP (ID+SYS™)

WHERE IS THE SERIAL NUMBER

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SCREW-DOWN CROWN
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FREE CROWN.
TURN RIGHT TO
MANUAL WIND
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QUICK SETTING LOCAL TIME¹ HOUR
DATE SETTING
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SETTING² GMT 24H MINUTES SETTING
SECONDS HAND STOP

SETTING THE TIME, GMT SECOND TIME ZONE, AND CALENDAR

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TIP. For timekeeping accuracy, first adjust minutes going position 3 and stopping seconds hand to cero (12H), using an seconds website external reference. Also, note that the position 3 adjusts GMT hand.
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IMPORTANT. REMEMBER: ALWAYS RETURN THE TIME CROWN TO POSITION ‘0’ AND SCREW IT BACK IN TIGHTLY UNTIL YOU FEEL RESISTANCE TO ENSURE WATER RESISTANCE AND AVOID POTENTIAL SEALING ISSUES.

ADJUSTING THE INTERNAL UNIDIRECTIONAL BEZEL WITH THE DIVE TIME CROWN

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'0' (ZERO, STARTING INDEXE) ON INTERNAL BEZEL

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TURN THE DIVING CROWN UNTIL THE BEZEL INDEX '0' IS ALIGNED WITH THE MINUTE HAND

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30 MINS HAVE PASSED SINCE YOU STARTED COUNTING

ONLY ROTATE LEFT (LOOKING TOOLWATCH)

START COUNTING TIME. TURNING THE DIVE CROWN, IN ORDER TO ALIGN '0' BEZEL INDEX WITH THE MINUTE HAND

To set the start of dive time or the timing of a specific period, you must turn the Dive Time crown counterclockwise (rotate or move it to the left when looking at the watch). This action will rotate the internal 0-60' bezel until the 0 marker (the largest index or the zero on the 0 to 20 scale in some models) aligns with the current position of the minute hand. This initiates the countdown or timing of minutes used during the diving activity or other tasks.
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MAINTENANCE OF THE DIVE TIME CROWN. FREQUENT USE OR PRO OF THE DIVE TIME CROWN IN MARINE ENVIRONMENTS WILL REQUIRE GASKETS REPLACEMENT AT A SERVICE CENTER EVERY 3 YEARS. FOR MODERATE OR OCCASIONAL USE, SERVICING WILL BE NEEDED EVERY 5-6 YEARS.
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IMPORTANT. Never turn the Dive Time crown clockwise when looking at the watch, as this can damage the mechanism! If unsure, check the engraved arrows on the watch case, which indicate the correct direction for rotation.
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Tools you’ll need to adjust or change FKM straps: You should have it nearby the two tools provided with your watch, as well as a cutter with ruler, or sharp scissors.
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ADJUSTING THE FKM STRAP TO YOUR WRIST

To properly adjust the FKM strap to your preferences while keeping the clasp centered on your wrist, follow these steps:​

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Detach the 6H strap. Use the spring bar tool included with your watch to detach the 6H strap from the clasp. Leave the 12H strap securely attached, ensuring it is fully inserted to the stop point of the micro-adjustment and Divers adjustment system.

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PRESS THE SPRING BAR TO DETACH AND ATTACH. FIRST ONLY DETACH 6H STRAP

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Fit the watch on your wrist. Place the watch on your wrist, holding the case to prevent it from falling, and lay the loose 6H strap over the clasp attached to the 12H strap.

Count the excess holes. Count how many holes extend past the clasp. For example: If you have 4 excess holes, cut 2 segments from each side. If you have 2 excess holes, cut 1 segment from each side. If the number is odd, cut one extra segment from the 12H strap side. Use the lines on the strap as a cutting guide.

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Detach the 12H strap from clasp if necessary. If you need to cut the 12H strap, detach it from the clasp by pressing the inner ‘Unlock’ button on the clasp and pushing the strap out to access and disconnect it.

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Reattach the spring bars. Once the strap is cut, reinsert the spring bars, ensuring they click securely into the designated clasp holes. And... you're all set!

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3 HOLES LEFT. SHORTEN ALONG THE LINES ON THE INSIDE. DISTRIBUTE THE EXTRA AMOUNT ON EACH STRAP.

FOR THE MEASUREMENT, MAKE SURE THAT 12H STRAP IT’S ALL INSIDE CLASP

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OPENING, CLOSING, AND ADJUSTING THE EXTENDER FOR FKM STRAPS / BRACELETS

The two black side buttons allow for quick release of the clasp. For security, both buttons must be pressed simultaneously to release it. To close it, simply apply pressure until you hear a click. To use the extender—for micro-adjustments on your FROG300, or to wear it over a wetsuit or technical suit—push the ‘Unlock’ button outward on the clasp and readjust by sliding the strap or bracelet back inside.

​

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MICROADJUST FOR A PERFECT FIT, WITHOUT REMOVING THE WATCH FROM WRIST, JUST BY OPENING THE CLASP

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THE WARRANTY DOES NOT COVER STRAPS THAT HAVE BEEN CUT. IT IS YOUR RESPONSIBILITY TO ADJUST THEM CORRECTLY.
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IF YOU’RE UNSURE HOW TO ADJUST YOUR STRAP, THE BEST OPTION IS TO VISIT A WATCH STORE FOR PROFESSIONAL ASSISTANCE.

INSTALLING THE ID+SYS™ APP

To connect and add¹ information to the ID+SYS™ Emergency Data System on your FROG300 watch-instrument, you first need to install our MYOX© application.

 

If your smartphone uses iOS, go to the Apple² App Store. If you use the Android² operating system, download the app from Google² Play.

 

Once installed, register and follow the steps to connect the ID+SYS™ system for the first time to the blue disc on your OX® FROG300.

MYOX©

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1  PATENTED SYSTEM. USES NFC TECHNOLOGY BY OX® OCEANIX WATCHES LLC.

2 APPLE, ANDROID, AND GOOGLE ARE REGISTERED TRADEMARKS OWNED BY THEIR RESPECTIVE COMPANIES AND ARE MENTIONED HERE FOR INFORMATIONAL PURPOSES ONLY. OX OCEANIX WATCHES LLC HAS NO RELATIONSHIP WITH THESE BRANDS BEYOND USING THEIR APP PLATFORMS.

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WHERE YOU CAN FIND THE SERIAL NUMBER

Each OX® FROG300 has a unique serial number. For warranty purposes or situations such as insurance claims, you may need to know this number. It is engraved on the back piece of the watch. To access it, you must unscrew and remove the blue ID+SYS™ disc. Gently rotate the disc counterclockwise (to the left) without applying pressure. This will allow you to unscrew it easily and reveal the caseback (yellow titanium part in all models, with the exception of the gold series that it´s white 18K-750 real Gold w/Platinium alloy) where the serial number is engraved.

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The blue ID+SYS™ disc screws on and off effortlessly. Simply place your fingers on it and rotate without applying pressure to remove or reattach it. There’s no need to overtighten—just a few turns will suffice.

Download complete FROG300 User Manual

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©2021/2025 OX OCEANIX® WATCHES LLC. ALL RIGHTS RESERVED. DUE TO OUR POLICY OF CONSTANTLY IMPROVING QUALITY, WE RESERVE THE RIGHT TO CHANGE ANY SPECIFICATION WITHOUT PRIOR NOTICE. OX-OCEANIX®, FROG300®, COSMOBAND™, ID+SYS™ ARE REGISTERED TRADEMARKS OWNED BY OX - OCEANIX WATCHES / JOSEPBOLART.  ID+SYS™ IS A REGISTERED DESIGN AND PATENT PENDING. EMERGENCY DATA SYSTEM EU/USA/LATAM (PROCESS 06/2023). FROG300® MODEL DESIGN AND DIVER'S CONFIGURATION IS INTERNATIONAL REGISTERED. TRADEMARKS MIYOTA®/CITIZEN MOVEMENT DIVISION® ARE OWNED BY CITIZEN WATCH CO. LTD. OTHER BRANDS LIKE US COAST GUARD® (PHOTOS) AND NASA® ARE MARKS OWNED BY THEIR RESPECTIVE OWNERS AND ARE USED ON THIS WEBSITE EXCLUSIVELY FOR INFORMATIONAL PURPOSES OR AS A REFERENCE TO A SITUATION. ©NASA ©PEXELS ©UNSPLASH FOR SOME BACKGROUND USED IMAGES. PRODUCT TEXTS AND TECHNICAL INFORMATION MAY CONTAIN ERRORS. THE SIZE OF THE WATCHES DOES NOT CORRESPOND TO THE ORIGINAL SIZES OF THE WATCHES, AND THE DISPLAYED COLORS MAY SLIGHTLY VARY FROM THE ORIGINAL. SALES TAX INCLUDED IN ALL PRICES SHOWN. DEPENDING ON THE COUNTRY OF PURCHASE, THERE MAY BE ADDITIONAL CUSTOMS AND/OR IMPORT COSTS, WHICH WILL BE THE SOLE RESPONSIBILITY OF THE BUYER. OX OCEANIX SCUBA WATCHES COMPANY CAN ONLY ENSURE A FAST AND PROTECTED SHIPMENT WITH ALL THE GUARANTEES.

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