marine science help!?
What two instruments made navigation much easier in the 1900s?
a. Global Positioning Satellite (GPS) and two-way radio
b. The chronometer and the astrolab
c. The cross-staff and the compass.
d. The chronometer and the compass
a.
GPSMAP 640 Marine and Street Navigation Gps
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Magma Nestable 7 Piece S.S Starter Cookware Set $163.73 Each Bottom Is Then Milled Perfectly Flat For Superb Even Heat Distribution On Gas, Electric, Or Ceramic Cook Top Surfaces. With Benefits Of Being Oven Safe, Dish Washer Friendly And The Option Of Adding To Your Set By Purchasing Additional Individual Pieces, This Set Is A Must Have. Professional Quality Cookware At A Value Price For Boaters, Outdoorsman, Or Rv Enthusiasts Just Getting Started O… |
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Thermos Element 5 Leak-Proof Travel Mug 16 oz. $34.85 Capacity: 16 Oz. Keeps Hot – 6 Hours, Keeps Cold – 8 Hours…. |
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NorCross Marine Sonic Laser Scale SP $49.49 Sonic-Laser Scale SPHands Free Fish Weight and Length MeasurementCatch Weigh Measure Release. Never Handle a Fish Again… The Sonic-LaserScale SP is a digital fishing scale that doubles as a multifunction ultrasonic fish measuringdevice.Traditional fish measuring devices require the user to lay a fish on a measuring boardor stretch out a conventional measuring device. Well documented research ind… |
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Bennett Marine Video N1321DVD DVD, Garmin Ique 3200 Pda, $5.97 With interactive menus that allow quick and easy chapter review time and time again, this instructional DVD teaches all the features and functions of the Garmin® iQue® 3200 unit from the basics to advanced operation. Learn the simple, quick and smart ways to communicate, manage information and everything you need to know to begin using your new PDA in minutes!… |
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DVD, Lowrance Iway 350C $6.00 This step-by-step, instructional training program walks you through the key features and functions of the Lowrance iWay 350c unit from the basics to advanced operation. Learn everything you need to know to begin using your new satellite navigator from projecting waypoints to mapping areas and setting up routes…. |
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Bennett Marine Video N4050DVD DVD, Cobra Gps 100, 500, 1000 $3.85 DVD COBRA GPS 100, 500, 1000″Getting started with your GPS unit has never been easier!”This is the most comprehensive, instructional, training DVD to teach you all the features and functions & HOW TO USE your unit.DVD training makes it easy! Interactive menus allow quick and easy chapter review and allow you to go to a specific location time and time again.This step-by-step, instructional training… |
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Gps Navigation $73.88 Gps Navigation |
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Garmin GPSMAP 441 4.0 Marine GPS Navigation $417.99 Part#: 010-00766-00 Type: Marine GPS & Fishfinder SBAS: WAAS Receiver: High-Sensitivity Receiver Channels: 14-Channel Antenna: Built-In Map: Coastal maps Waypoints: 3000 |
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Garmin GPSMAP 536 5.0 Marine GPS Navigation $654.99 Part#: 010-00773-00 Type: Marine GPS & Fishfinder SBAS: WAAS Receiver: High-Sensitivity Receiver Channels: 12-Channel Antenna: Built-In Map: Inland maps Waypoints: 3000 |
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Celestial Navigation in the GPS Age $21.95 Celestial Navigation in the GPS Age |
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Garmin GPSMAP 536s 5.0 Marine GPS Navigation with Dual-Beam Tranducer $860.99 Part#: 010-00773-01 Type: Marine GPS & Fishfinder SBAS: WAAS Receiver: High-Sensitivity Receiver Channels: 12-Channel Antenna: Built-In Map: Inland maps Waypoints: 3000 |
