<entry id="2189647" stat="A" corpus="jmdict" type="jmdict">
<ent_corp type="jmdict">jmdict</ent_corp>
<ent_seq>2803680</ent_seq>
<k_ele>
<keb>三等航海士</keb>
</k_ele>
<r_ele>
<reb>さんとうこうかいし</reb>
</r_ele>
<sense>
<pos>&n;</pos>
<field>&mil;</field>
<gloss>third mate</gloss>
<gloss>third officer</gloss>
</sense>
<info>
<audit time="2013-11-22 00:03:30" stat="A" unap="true">
<upd_name>Francis</upd_name>
<upd_detl>You already have the following:-

 一等航海士 【いっとうこうかいし】 (n) first mate; first officer

The above submission gets even more Google hits at 114k.

You also have the basic entry of:-

航海士 【こうかいし】 (n) mate; navigation officer

I have not done 2nd mate. Awaiting for your comments on 3rd mate first. I don't think that 4th mate exists as such.</upd_detl>
<upd_refs>See below.</upd_refs>
</audit>
<audit time="2013-11-22 00:33:47" stat="A">
<upd_uid>jwb</upd_uid>
<upd_name>Jim Breen</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_refs>GG5, 中辞典, Eijiro</upd_refs>
</audit>
<audit time="2013-11-22 00:34:32" stat="A">
<upd_uid>jwb</upd_uid>
<upd_name>Jim Breen</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_diff>@@ -12,1 +12,2 @@
-&lt;gloss&gt;third mate (officer)&lt;/gloss&gt;
+&lt;gloss&gt;third mate&lt;/gloss&gt;
+&lt;gloss&gt;third officer&lt;/gloss&gt;</upd_diff>
</audit>
<audit time="2022-06-08 11:10:57" stat="A">
<upd_uid>Marcus</upd_uid>
<upd_name>Marcus Richert</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_diff>@@ -11,0 +12 @@
+&lt;field&gt;&amp;mil;&lt;/field&gt;</upd_diff>
</audit>
</info>
</entry>