Lesson Plan: Using Real-Time Tide Data

Authors:
Zach Smith

Grade Level:
9–12

Subject Area:
Earth Science

Resources:

Standards Addressed:
National Science Education Standards

Content Standard A: Science as Inquiry

Content Standard B: Physical Science

Content Standard D: Earth and Space Science

Content Standard E: Science and Technology

Time Required:
Three 45-minute class periods.

Period 1: Research shipwreck and local conditions.

Period 2: Chart tides, currents, and weather in the area.

Period 3: Present plan to class and compare plans between groups.

Lesson Goal:
The overall goal for this lesson is for students to use real-time tide data to develop a plan for the best time to excavate a ship wreck.

Learning Objectives:

Prerequisite Knowledge:

Background

Maritime salvage teams, treasure hunters, and archaeologists are often confronted with unidentified shipwrecks. While much can be learned from the study of the shipwreck site itself, important information can also be gleaned from linking the sunken vessel to the historical record. Maritime archaeologists make the link by comparing the observed characteristics of the shipwreck to the characteristics of ships known to have sunk in that vicinity. This combination of archival information and imagery can help produce a detailed picture of the vessel's physical construction and its activities, as well as offer insights into how and why it sank and if salvage operations are possible.

Prior to the beginning of salvage projects, archival research by examining books, newspapers, manuscripts, photographs, and paintings that document an areas maritime history. The information gathered from these sources formed the basis for a list of vessels wrecked in an area. Further historical research identified particular construction characteristics that would enable researchers to make a positive identification of the vessel once the correct wreck was explored and mapped. These characteristics included the steamship's length and breadth and its construction.

Many times stranded or disabled vessels require immediate rescue or salvage operations. Though rescue operations take place despite difficult conditions, salvage can often take place when conditions are favorable. Since many wrecks take place in areas where storms or hazards forced vessels onto shoals or shorelines, salvage operations rely on proper timing of tide, current, and weather.

Adapted from NOAA http://oceanexplorer.noaa.gov/explorations/03portland/background/verify/verify.html

Procedures/Instructional Strategy:

  1. Students will build a tidal chart for predicting low tide and the best possible time for excavating a shipwreck. Example shipwreck- Corinthian, from http://nswrecks.net Date of wreck: December 14, 1918 Location: ~44 o 17'16.86" N/66o 26'46.61"W Other information: Grounded on ledge in 60' water and later broke up http://museum.gov.ns.ca/mma/wrecks/wrecks/shipwrecks.asp?ID=4451

    Corinthian ship



  2. Divide the class into small groups of no more than four.

  3. Explain the assignment:
    • Use tidal, current, and weather data to determine the best time to excavate a shipwreck.
    • Use NOAA website/references to determine timing and shipwreck sites to understand history of wrecks in the area.
    • Explore the movement of the tides and determine the amount of time available to explore and recover the wreck
    • Students will prepare written and oral plans that answers the following questions: Timing of excavation, safety concerns, possible cause of ship wreck, required equipment, recommendations for preventing future ship wrecks in that area.

    • Give the students homework to research tides and coastal shipwrecks.

    • Ask students to evaluate each other's discussions.

 

Outcome/Assessment:
Students will create a report that addresses all the criteria for an effective plan for predicting tides and excavating shipwrecks.

Extensions:

  • Students can create poems, tales or images that share their thoughts, feelings, and visions about ship wrecks.
  • Collect and evaluate your own observations/research on shipwrecks.
  • Classroom Resources:
    Computer access for students

    Lesson Plan File:
    (entire word document containing complete lesson plan and supporting attachments)
    Download Here (pdf, 24)

    Student Work Description:
    A student's shipwreck excavation report.

    Sample of Student Work:
    Download Here

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