Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Navigating with the Kamal   The students build and use an old navigational tool from the Arab world of
the 9th century, the kamal. After an introduction to historic seafaring and
navigation, they build this simple tool and understand how it can be used to
measure angles. After learning that the elevation of Polaris is (almost)
identical to the latitude of the observer, they apply this knowledge while
using the kamal. During a field trip, they actually measure the elevation of
Polaris. The result is compared with modern methods.

10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th