At Karimunjawa National Park in Indonesia, Karimunjawa Alliance (AKAR) activists and Rainbow Warrior activists have escorted out barges carrying coal from mines from Kalimantan to power plants in Java, Indonesia. The barges and its tug boat were targeted when anchoring inside Karimunjawa National Park area, to protest against the coral reefs damage done by coal barges.
Since January 2018, there have been three incidents in the area where coal barges have damaged the reefs. In early 2017, hundreds of square meters of coral were destroyed by five barges taking shelter during storms. 

Pada 2 Mei 2018, Aktivis Greenpeace dan AKAR dalam Rainbow Warrior di wilayah Taman Nasional Karimunjawa melakukan pengusiran tongkang yang membawa batubara dari pertambangan di Pulau Kalimantan ke PLTU di Pulau Jawa. Kapal tongkang ini ditemukan sedang membuang sauh di perairan Taman Nasional Karimunjawa.
Sejak Januari 2018 sudah ada tiga kejadian terumbu akibat kapal-kapal tongkang ini. Awal 2017, ratusan meter persegi hamparan terumbu karang rusak akibat kegiatan kapal-kapal tongkang di wilayah ini yang ingin berlindung dari badai.